Understanding Your Cycle, and the Signs Something Is Off

If you're in your late 20s to early 40s, you've probably had your period for well over a decade. And yet, so many women still feel like they're guessing when it comes to understanding their menstrual cycle.

You know when to expect your period (mostly). You stock up on painkillers and brace yourself for the mood swings, exhaustion, sugar cravings and the bloating. This is all ‘normal’ - so we’re told.

But your cycle is one of the most reliable indicators of your overall health; When something is off with your nervous system, thyroid, stress levels, gut, or your nutrition, your cycle will often show it.

The problem is that most of us were never taught to read these signals. We were told to expect cramps, mood swings, and a bleed every 28 days. We were told pregnancy would just happen when we were ready. We were told menopause happens sometime in your 50s or 60s. But none of that is guaranteed.

Many women are struggling to conceive. Many are entering perimenopause or menopause in their mid-to-late 30s. Chronic, debilitating period pain is so common that it's been normalised, but that doesn't mean it's normal or acceptable.

I want you to think of your cycle as feedback form, and when you learn to interpret it, you can gain clarity about what's happening inside your body and what needs your attention.

What a Healthy Cycle Looks Like

The quality of your entire hormonal pattern across the month matters, including how you feel, what symptoms you experience, whether you're ovulating, and how your body responds to the natural rise and fall of hormones. A healthy menstrual cycle isn't just bleeding once a month.

A typical cycle lasts 25–32 days and includes four distinct phases:

1. Menstrual Phase (Days 1–5)

This is the bleed and your body sheds the uterine lining because pregnancy didn't occur. Oestrogen, progesterone, and testosterone are all at their lowest.

Energy is naturally lower during this phase. You might feel more introspective, less social, more tired. This is the time your body is recovering and resetting.

What's normal: Bleeding for 3–7 days, moderate flow (changing a pad or tampon every 3–4 hours), some mild cramping on day 1 or 2.

What's not normal: Debilitating pain that stops you from functioning, soaking through protection every 1–2 hours, clots larger than a 50p coin, throwing up, bleeding for more than 7 days.

2. Follicular Phase (Days 6–14)

Oestrogen rises as your body prepares to ovulate and your energy increases. You may feel more focused, motivated, social, and optimistic. Cervical fluid becomes clearer and more abundant as ovulation approaches.

This is often when you feel your best or most productive and like yourself.

What's normal: Increasing energy, better mood, clearer thinking, stretchy or egg-white cervical mucus as ovulation nears.

What's not normal: No noticeable energy increase, persistent fatigue, no changes in cervical mucus, feeling flat or depressed throughout this phase.

3. Ovulation (Mid-Cycle, Around Day 14 - But Check!)

Luteinising hormone (LH) surges, triggering the release of an egg from the ovary. Oestrogen peaks and testosterone may also rise slightly.

You might notice increased libido, peak energy, glowing skin, and abundant fertile cervical mucus (clear, stretchy, resembling raw egg white).

What's normal: A noticeable shift in energy or mood, fertile cervical mucus, possible ovulation pain (mittelschmerz) on one side.

What's not normal: No signs of ovulation at all such as no cervical mucus changes, no temperature shift (if tracking), no noticeable physical or emotional shifts at all.

Note: Track your ovulation using LH testing strips or temperature tracking if you want to know for sure when you are ovulating as this is different for everyone.

4. Luteal Phase (Days 15–28)

After ovulation, the empty follicle becomes the corpus luteum, which produces progesterone. Progesterone supports a potential pregnancy by thickening the uterine lining and raising your basal body temperature slightly.

If pregnancy doesn't occur, progesterone and oestrogen drop, triggering menstruation.

You might feel slightly less energetic than in the follicular phase, but you should still feel relatively stable. Some women notice breast tenderness, slight bloating, or food cravings in the days before their period, but these symptoms shouldn't be severe or life-disrupting.

What's normal: Mild breast tenderness, slight bloating, some food cravings, a small dip in energy or mood in the final few days before your period.

What's not normal: Severe PMS that disrupts your life such as intense mood swings, rage, debilitating anxiety or depression, insomnia, painful bloating, uncontrollable cravings. A luteal phase shorter than 10 days (which can indicate low progesterone and affect fertility).

Signs Your Cycle Needs Attention

Many women are told their symptoms are "just part of being a woman" or "normal for periods." While some hormonal shifts are expected, suffering is not normal. Your period shouldn't stop you from living your life.

Here are key signs that something is off:

1. Severe PMS or PMDD-Like Symptoms

Extreme mood swings, rage, anxiety, or depression in the week or two before your period. Food or sugar cravings so intense you feel out of control, bloating that's painful, breast tenderness that makes wearing a bra unbearable and insomnia that leaves you unable to function the next day.

If PMS consistently disrupts your work, relationships, or mental health, that's not something to endure in the name of “normal”.

Possible causes: PMDD, Low progesterone, poor oestrogen metabolism, HPA axis dysregulation (chronic stress affecting your adrenal and hormone systems), blood sugar imbalances, nutrient deficiencies (especially magnesium and B6) or thyroid issues.

2. Irregular Cycles

Cycles shorter than 24 days or longer than 35 days. Skipped periods for months at a time (when you're not pregnant, breastfeeding, or in perimenopause). Cycles that vary wildly from month to month with no predictable pattern.

Possible causes: PCOS, thyroid dysfunction (hypothyroidism or hyperthyroidism), chronic stress, under-eating or over-exercising, perimenopause, hypothalamic amenorrhea.

3. Painful Periods (Dysmenorrhea)

Needing to take painkillers regularly just to function. Missing work or canceling plans because the pain is too severe. Sharp, stabbing cramps. Lower back, hip or leg pain. Heavy clotting.

Pain severe enough to disrupt your life is not normal, even if it's common.

Possible causes: Prostaglandin imbalance (the chemicals that cause uterine contractions), inflammation, endometriosis, adenomyosis, fibroids.

4. Heavy Bleeding

Bleeding for longer than 7 days. Soaking through a pad or tampon every 1–2 hours. Passing large clots. Feeling exhausted and lightheaded during your period.

Heavy bleeding can lead to iron deficiency anemia, which causes fatigue, brain fog, and weakness.

Possible causes: Oestrogen dominance (too much oestrogen relative to progesterone), fibroids, polyps, adenomyosis, poor iron metabolism, clotting disorders.

5. Very Light or Short Bleeding

A period that lasts only 1–2 days. Flow so light you barely need protection. Spotting instead of a proper bleed.

This can indicate that your body isn't producing enough oestrogen or progesterone, or that you're not building up enough uterine lining.

Possible causes: Low oestrogen, thyroid imbalance, hypothalamic amenorrhea (often from chronic stress, under-eating, or over-exercising), perimenopause.

6. Not Ovulating (Anovulation)

You might still have regular bleeds, but without actually ovulating. This can happen if you're not tracking ovulation signs (temperature shift, or fertile cervical mucus).

You can bleed without ovulating; This is called an anovulatory cycle, and it's more common than most women realise.

Possible causes: PCOS, chronic stress, thyroid dysfunction, perimenopause, under-eating or excessive exercise.

What Might Be Driving These Issues

Cycle irregularities don't happen in isolation, they're usually connected to something else going on in your body. Common underlying drivers can include:

Chronic stress (including under-eating and over-exercising): High cortisol suppresses the hypothalamus, which controls your reproductive hormones. Over time, this can stop ovulation altogether.

Blood sugar imbalances: Insulin resistance contributes to oestrogen dominance, worsens PMS, disrupts ovulation, and can trigger hormonal acne.

Nutrient deficiencies: Low magnesium, B vitamins, iron, zinc, or amino acids can impair hormone production and metabolism.

Poor gut health: Your gut bacteria (specifically the oestrobolome) help metabolise and eliminate oestrogen. If your gut is imbalanced or struggling, oestrogen can recirculate, leading to oestrogen dominance.

Environmental toxins: Xenoestrogens from plastics, personal care products, and cleaning products mimic oestrogen in your body and disrupt hormone balance.

Underlying conditions: PCOS, endometriosis, thyroid dysfunction, or autoimmune conditions can all significantly impact your cycle.

If you're seeking clarity about what's driving your symptoms and any underlying medical conditions have been ruled out, functional medicine testing can assess gut health, nutrient status, hormone levels, and stress markers. Once you understand your baseline, you can build targeted nutrition and lifestyle strategies that actually work for your body.

When to Seek Support

If your period is consistently irregular, painful, heavy, or causing significant emotional or physical disruption, don't wait or accept this as “just being part of being a woman”. Speak to your GP and ask for a gynaecology referral for investigation.

You can also work with a qualified nutritional therapist or women's health specialist who can support your cycle health through nutrition and lifestyle interventions, particularly if:

• You're trying to conceive and not ovulating regularly

• Your symptoms are worsening

• You suspect endometriosis, PCOS, or thyroid dysfunction and want a holistic approach alongside medical investigation

• You've been dismissed by your GP and need someone who will listen and help you advocate for yourself

There are real, evidence-based tools to support your hormones and menstrual health. Learning to interpret it gives you agency over your health and clarity about how your body is functioning.

In a world that trains women to override their symptoms and push through, paying attention to your cycle is both an act of rebellion and an act of both personal responsibility and care.

Consider booking a free discovery call to assess to talk through your current hormonal health and how I can help.