Vaginal tear or abrasion during sex

So this is new...

Today things got heated between my boyfriend and I and we started having sex. From the time we began kissing to when he was penetrating me was like 2 minutes or less so I’m guessing I wasn’t wet or open enough. Felt great missionary, I was about to cum when he turned me around to pound me from behind and he paused and said “oh, you’re bleeding!” I turned around and wiped myself and sure enough blood and a fair amount of it. I honestly started freaking out thinking it was bleeding between periods and was fine a minute prior. Worried that he hurt me we stopped. A few minutes later it began to sting in one spot up inside and that’s when I realised we must have jumped in too quick and he scraped me inside. Not fun.