Bleeding??

Gwen

So my period ended on the 27th and I made sure the next day and my boyfriend and I had unprotected sex really quick before he went to work (he did ejaculate inside me) and it wasn't rough or dry or anything, just the normal. After maybe 4 hours later I go to the bathroom and when I was done I wiped and the toilet paper was red, it wasn't period blood because it didn't smell and it wasn't thick and not a lot, what is this?