Bleeding during/after sex

So I've had sex a lot recently over the past couple of weeks with the same person using protection and I never had any bleeding before tonight. (Just lost my virginity 13 days ago but had no bleeding). It's been about 4 hours now and the bleeding isn't as bad as it previously was. There's also some pain on the left side near the opening of my vaginal and it hurts slightly when I pee. I was wondering if it was possible to have just broken my hymen today instead of the first time I had sex. We tried a different position today so that may have something to do with it.