URGENT. TMI What's wrong with my period?TMI

Phoebe
Hiii! I am concerned about my period. I woke up yesterday with blood on my underwear. My menstruation is irregular but it usually manifests at the end or at the beginning of the month. When I put on a tampon. The bleeding stopped. Then, there it came a lot of dark brown blood. Stopped again. It started pink. Stopped. Started heavy with bright red and dark mucus when I walked. Stopped again...
I'm not used to this. I have no idea. My period usually was heavy. This is just weird. And now, just a few drops come. I feel so week. I am also scared.
Is this normal?
(Btw, I think I have PCOS. But ths never happened before)
Also sorry for the pic. Hope it's not disturbing. Thanks a lot.

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