What are the symptoms of Vestibulitis? ?

I think I have it, but am unsure. My friend had it and said my symptoms were the same as hers: very painful love making with my boyfriend, I can not wear a tampon, when I do make love w/ my boyfriend, it feels like he's gong to blow right out of my abdomen! Dr's have told me to use more lube, which we've done. They say there is nothing wrong with me. I was born early and have some adhesion's and scarring on my abdomen, as well as a C-Section. I don't want to tell my boyfriend about it... I'm afraid he'll think it's his fault, which it's not. My ex husband was a real jerk about it. I never wanted to be with him and he was just cruel about it. Said it was like making love to a dead fish! I love my boyfriend and he's GREAT. Any suggestions? No dr has been able (or willing) to help. They all say I'm normal and need to relax! I know I tense up before because it's going to hurt. helps. but there is still pain! Thanks!