Pain and itching down there

Had sex with my boyfriend yesterday, but we got too much into it and it became a little too rough maybe. I didn’t feel any pain until a few minutes after we finished, and my vagina has been very sore for the whole night and actually hurt quite a bit, with even a little blood coming out (but it could just be spotting). Today the pain is gone, but it itches a little bit. Do I have to get worried?

(He did cum in me, but it wasn’t the first time. So, unless he cheated on me — which I don’t think it’s the case —, I’d say he doesn’t have any STDs)