So I'm tight, my boyfriend is big. We have regular sex and it doesn't hurt so bad and feels good. But when it comes to round two or three the bottom of the opening to my vagina hurts? I may even be using the wrong terminology, is this the bottom of my hymen? It's a thin skin and if I even touch it I feel pain as if I'm touching an open wound! Is this my hymen that is being stretched and feeling irritation? I think it may be a friction problem too?