Postpartum period?

I am 7 weeks pp, exclusively breastfeeding and last night my husband and I tried to have sex but I told him he was being too rough and it hurt, I even tried to ignore it a little and thought maybe I just had to get used to it. But literally like 2 mins into it I was just like u know what , Nope it hurts I don’t like it. So this morning I got up to pee and there was pink in the paper and I’m like I told you , you were being too rough u made me bleed! .. but then like 2 hours later I’m bleeding a little more now it’s red and I had very very mild period symptoms.

Can it come back this early even though I’m breastfeeding???