Why your cycle went rogue
Your ovaries are running low on follicles, and the remaining ones are getting erratic about ovulating. No ovulation means no progesterone surge, which means your uterine lining builds up under estrogen alone until it eventually gives up and sheds — heavily, unpredictably, or both.
The classic early pattern: cycles shorten (25 days instead of 28), then start stretching and skipping. Bleeding gets heavier or lighter or both in the same year. This chaos is the definition of perimenopause, and it can run four to eight years. We know. We're sorry.
What's normal-weird
In perimenopause, all of these are common and usually benign: cycles anywhere from 21 to 60+ days, skipped months followed by a comeback tour, heavier flow than you're used to, spotting before your period, and clots up to about the size of a quarter.
Annoying? Deeply. Dangerous? Usually not. But "usually" is doing some work in that sentence, which brings us to…
When it's time to get checked
Book an appointment — soon, not eventually — if you have: bleeding through a pad or tampon every hour for several hours, bleeding longer than 7–8 days, cycles shorter than 21 days repeatedly, bleeding after sex, spotting between periods that persists, or any bleeding after you've gone 12 months without a period (that's postmenopausal bleeding and always needs checking).
Heavy bleeding also quietly drains your iron. If you're exhausted, breathless on stairs, or craving ice, ask for a ferritin test. Iron deficiency is miserable, common, and very fixable.
Fibroids, polyps, and thyroid problems all love this age bracket and all mimic "just perimenopause." A clinician who takes you seriously will rule them out rather than hand-wave.
What can calm the chaos
Hormonal options: a levonorgestrel IUD dramatically lightens or stops bleeding for most women and doubles as the progesterone half of HRT. Low-dose birth control pills smooth the whole ride and handle contraception too — yes, you still need it; perimenopausal surprise pregnancies are a genre. Cyclic progesterone is another gentler option.
Non-hormonal: tranexamic acid (taken only on heavy days) and NSAIDs like ibuprofen started at the first sign of bleeding both reduce flow meaningfully.
And track it. Any app, any method. Two months of data turns "my periods are weird" into a pattern a clinician can actually use.
The bottom line
Erratic, heavy, skipping periods are the opening act of perimenopause and usually normal — but flooding, bleeding after sex, or any bleeding after 12 period-free months needs a clinician. An IUD, pills, progesterone or tranexamic acid can calm it down. Track your cycle; data is power.
The fine print
This article is educational, not medical advice. It's reviewed by our founder, a Nurse Practitioner in women's health — but she isn't your clinician. Bring this stuff to someone who knows your history before acting on it.
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