What's happening with my period?

Ge

So AF arrived 3 days ago, right on time.. had spotting for 3 days before which I normally only get 1 day of.

Much lighter flow than normal, and now day 3 of period and there's nothing at all on the pad, just brown in CM when I wipe.

Was definitely AF as was red, so what's going on, I normally bleed for 7 days every time, why do I feel like I'm at the end of my period on day 3?? 🤔