What’s happening??

Okay so a little background, I had my baby 9 months ago and I got my first pp period around like 7 weeks. This last cycle, my period was late by late 3 months. So it started and it usually lasts 5 days, I figured it might be longer since it was so late but I went to the bathroom right before the situation I’m about to explain and there was nothing.

So last night my boo came over and like I said, I went to the bathroom and wiped nothing there. So we started messing around and he goes to the bathroom when we are done and had blood on his hands as well as me. But he had no blood on his dick or mouth, I’m confused. I was thinking maybe he knicked me with his nail?? I don’t think it was my period but this morning I wiped and there was brown