Period on birth control

I’m 9 weeks PP and I’m taking birth control pills. I still have a full week before I’m suppose to have my period on it and I started bleeding 2 weeks ago. Is this okay? ftm so idk what’s normal or not. I’m not concerned enough though to ask a doctor yet, so I’d thought I’d ask on here.

The bleeding isn’t super heavy but it keeps turning from dark red to brown