Pain during sex

Hey guys I was a virgin(I guess I still kinda am) until I met my current boyfriend, but we can never really have sex because of this pain I keep having. The only way I can explain this pain is a sharp,burning,tearing,tear inducing pain. My himen is gone and we use lube. The only thing I could think that can cause this is there is a possible case of abuse as a child but I don't remember it (Rohypnol).Please any idea is welcome, its to the point i hyperventilate at the thought of it.