Bleeding during sex..?

I got off my period yesterday and decided to surprise my boyfriend with some alone time. I gave my virgnity to him and we concluded that my hymen must have been broken before from playing soccer/softball/volleyball. Anyways, never bled while having sex. We've had rough passionate sex before, but not today. today was the first time I bled, and he wasn't even going hard! I was on top and I stood up to change positions and there was blood on the condom. It seemed a little dry up there from using tampons so we used extra lube than normal. Could this be my period returning or could it have gotten too dry up there and the condom could have tore something? So lost. Please help.