I think I have endo but I’m not sure.

For two years now I have been having extreme pain from my period and ovulation. For the first day of my period I get extremely nauseous and vomit all night. It even caused me to be go into the ER one night. I’m always in so much pain during my period. I get nauseous, my cramps are unbearable, I get dizzy, have terrible head aches, and get so unbelievably drowsy. I have gone to my primary doctor about it; all he did was check for cyst then gave me birth control. The birth control does help some what, it makes me not vomit. I still get terrible pains though. I’ve gone in 3 times for it and all he ever does is give me a new birth control to try. I’m tired of staying home from work and school because of this. What y’all think?