Bleeding

Hey girls, would be nice if someone actually answered this time, cause yano. I've tried everything else and even on here I get ignored, and obviously people read it anf I need help, so someone have respect and help ?

I had a miscarriage in October, then I went on the pill, I've missed a couple. And have had unprotected sex. I bleed 27th December, for 3 days, my normal period length. January 7/8 th 13/ maybe 14 days later, I bleed again, started off Brown, then went red then Brown again?!

I have no idea what's going on?