Why do I feel off before my period?

Because your hormones are doing something different every week of the month. Estrogen and progesterone rise and fall on a schedule, and mood, energy, skin, sleep and appetite follow along. Once you see the schedule, the "random" bad days stop being random. Here is the month in four phases, in plain language.

Days 1–5ish: your period

Both hormones are at their lowest. Common feelings: tired, achy, wanting warmth and rest. Cramps come from the uterus contracting. This is a maintenance week — the useful move is to lower expectations of yourself and rest without guilt.

After your period: the follicular phase

Estrogen climbs. Many people notice energy, focus and mood rising with it. If there is a week in your cycle when starting things feels easy, it is usually this one. It lasts roughly from the end of your period until ovulation.

Mid-cycle: ovulation

A short window — the egg is released around 14 days before your next period (not 14 days after the last one; this matters for irregular cycles). Estrogen peaks. Some feel social and confident; some notice a one-sided twinge, slight temperature rise or more discharge. The fertile window is about the 6 days ending the day after ovulation.

After ovulation: the luteal phase, ending in PMS

Progesterone takes over — a quieter, slower, hungrier stretch for many. In the last several days before the period, both hormones drop, and that drop is what most people experience as PMS: irritability, low mood, anxiety, tender breasts, bloating, headaches, poor sleep. Not imagination, not weakness — chemistry.

The part that actually helps: predictability

You cannot skip the luteal phase, but you can stop being ambushed by it. If you know Thursday is likely a stormy day, you schedule less, warn less patience, plan comfort. That takes two things: knowing your own cycle length, and a couple of months of noticing which symptoms hit you in which phase.

That is exactly what a tracker is for. CycleCast shows each phase as weather — sunny follicular days, a rainbow around ovulation, clouds in the luteal phase, storms for PMS — and its insights screen tallies which moods and symptoms you actually logged in each phase, so the pattern you learn is yours, not a textbook average.

This article is general information, not medical advice. If symptoms disrupt your life every month, talk to a doctor — severe cyclical mood symptoms (PMDD) are treatable.