Bleeding after having unprotected sex?

Daniela • Kasumi & Kassiani’s Mommy 💕💃🏻
After having unprotected sex and he came in me I went to the restroom peed went & i fell asleep. 8 hours later in the morning I went to pee and it was normal until I wiped. As I wiped a bit of blood was on the paper. It went on all day and now its brown. Why could this be happening?