Help my boyfriend makes me bleed after ?

I'm 18 and I've been with my boyfriend for a while now and recently he's seems to have gotten a bit bigger than normal n he's about 10'', I find that I am tight down there even though I've been having for a few year's. A few nights ago i was on top of him going my own rhythm and you know how guys get when they are about to c*m they like to go in harder and deeper, he sort of held on to my hips while he did and s@&t it hurt like hell that I bit made my lip bleed I was bitting it that hard to not scream. when he pulled out there was a fair amount of blood and my lower stomach is still painfull and bleeding a bit now and we havn't had s�x since. Have I ripped something? And what can I do so that it don't happen again?