Painful sex/intercourse!

My boyfriend and I have been together for a few years now, and sexually active for about 2. There basically is never a time that sex DOESNT hurt, and it gets so frustrating that (embarrassingly enough) I sometimes just burst out in tears due to the combination of pain and feeling so bad. I want to be able to enjoy it, but it hurts too badly. My gyno has brought up the possibility of endometriosis before because of my really bad period cramps, but is sex that's this painful also a symptom? I'm 20, and would like to get it checked out sooner rather than later if that could be the case! Thanks for any and all help!