What is this? *pic included*

I started birth control (microgestin ) November 14th (which is the day my last period started) my period ended November 18th. I had had unprotected sex once since then but he didn’t finish inside me, that was the 21st idk if that means anything ?? But just thought I’d be better to give more info than less. Yesterday it was much more brown but today it’s more reddish.. is this normal ??