Two periods a week apart?

Hello all, I’ve had this app for awhile but have never posted until now. I’ve been trying to figure out what’s going on but can’t seem to find any answers online so I’m going to give this a shot!

I had my “period” about a week ago. It was brown so I was thinking old blood but it lasted 7-8 days which isn’t typically normal for me. I’d say maybe medium flow.

Then today I seem to have gotten it again?? It’s bright red and heavy. I’ve never had this happen before where old blood lasted that long and then almost a week later I bleed again.

Any idea what this could be?

Somethings to note: I am on birth control for PCOS and take it responsibly. I also have a boyfriend and we are sexually active.