Hurt penis

So me an my boyfriend was messing around we had already went for around 1 well after we was both still out the roof horny so we was teaseing and one thing led to another he was extremely hard harder than I've ever saw him so we was doing it and I got really dry bc of him teaseing and so he keeps going till I couldn't bear the pain anymore and he also was going WAY harder than our ideal 2nd round and after he stopped I felt really drained and teird and the tip of his duck was hurting and later on he said it felt like  he was hitting somethin inside me and it bruised his dick what could he have been hitting? Why would this happen? He's in bad pain