Endometriosis??

So, I’ve started my menstrual cycle in the 7th grade and I’m now a 17 year old senior in high school. Every since I’ve had severe back pain and pelvic pain. When I first started we tried over the counter medication but quickly we realized that it wasn’t doing me any good. I was diagnosed with dysmenorrhea and was prescribed naproxen sodium 200mg and that worked for a while but it didn’t last long. So my doctor upped to 500mg then 550 mg and now I’m at the point where it doesn’t even help. Last semester, I would miss at least 2 or 3 days out of a month because of back pain. My menstrual cycle usually last 7+ days some months. I would try to push through it during the week with school but I don’t even last a whole class period. My flow is heavy but at this point I can’t take it anymore. I don’t want to go on birth control. So is there a possibility that I may have endometriosis or even uterine fibroids.

(P.S I’ve tried heating pads, hot tea, and all other remedies but no luck.)