After sex...

The last few months after finally got my cycle back after 6 years without (I have PCOS) when my DH and I get done having sex and I go to the bathroom to clean up there's always a little bit of blood. He is on the larger side but when we were dating we used to have sex ALL the time and way more rough than now and I never bled. Is this normal, does anyone else get this, should I be concerned?