I've had sex with my boyfriend for about two weeks now, but when he fully puts all of himself in me, it honestly hurts so bad that I have to stop and cry. Like, it feels good when he's doing his thing, but then he'll somehow just like.. shove it all in hard and it's so painful!! And I want to be able to go hard and fast with him! He also feels best when he is able to go all the way in and not hold back. I feel this could be a big barrier and our sex life. Any thoughts to what could be happening?