Postpartum bleeding (possible tmi, NO PICTURE)

Rebecca

My husband and I had sex before we were technically supposed to...I stopped bleeding at 4 weeks pp, so we had sex at about 4.5 weeks. All was well. Now at a little over 5 weeks pp, we had (kind of rough) sex. I'm spotting dark brown blood, and bled a little yesterday right after we finished.

I see my doc in a few days for my 6 week check up, but just wanted to know if I should be worried?