Bleeding after I already stopped?

Je

I am 7 weeks, almost 8, post partum. I stopped bleeding at 5 weeks and I was cleared to have sex at 6 and did the day of. I have had sex often since then. It didn’t hurt me really at all. I am now bleeding again! Not a ton.. but it’s there. I don’t feel crampy like I have my period. What could it possibly be from??