Random bleeding..

Is anyone having random bleeding after having your baby? I am 14 weeks post partum and didn’t stop bleeding until I was almost 9 weeks post partum and then it started back up a week later and ever since I have been randomly bleeding. Not sure if it could be the birth control messing with my body but I’m Only breastfeeding my daughter. No supplements for her as I’m producing enough even after going back to work. I’m just wondering if they is somewhat normal or something I should be checking into.