Okay mommies... I need help..

I'm 2 months postpartum and had my period about a week ago even though I'm breastfeeding (my mom always got her period before she was some breastfeeding as well).

So I've been off my period for a week and I'm bleeding again for some reason. Not a lot but do you think I should go to the doctors?? I stopped bleeding from birth about the third week of her being born. I'm just scared there's something wrong...

(I'm on the mini pill for birth control, maybe that's causing it??)