Tearing?!

So I recently had sex over the weekend and this is the second or third time this has happened. We would have sex, then after I would be very sore (I’m still getting used to it) and then a day later, it would be annoyingly painful and itchy (like a healing itch) and then it goes away completely after a few days. It is only at the very back of my vagina. Is it possible that we are being too rough or if I need lube??

**we are both clean. We both get checkups**