Help me Orgasm!!!

Julia
I don't know what it is but I don't think I'm orgasming during sex, but I can't tell for sure if I am or not. Whenever I masturbate I always have a sort of "explosive" orgasm, but when I have sex or my boyfriend gives me oral, I've only reached that "explosive" feeling one time. Am I just having a mini-gasm? It still feels great during sex, I just haven't had the explosion.