Could this be endo?

Hello everyone! I am not diagnosed endo but I suspect that I may have it. Sorry in advance for the long post but to anyone who reads thank you so much! I am 22 years old and ha e struggled with severe period cramps since about age 13 when I got my period. They are extremely painful to the point where I have passed out and thrown up from the pain. Sorry for the TMI but some night I would wake up in the middle of the night and the cramps would become so intense that I would poop before I could even make it to the restroom. I remember several times in school where I had to call home to be picked up because the pain was too much to function and I had to be put into a wheelchair to get to the car. I always thought I just got bad cramps and maybe I was overly sensitive. But that started to change as I got older and became more aware of my body. I will often get bad bloating. Just recently I couldn’t even zip up my bridesmaid dress because I was so bloated thank goodness I wasn’t on my period for the wedding. The type of pain varies a lot but it cause pelvic pain and my legs and joints hurt as well. I also get really bad back pain that is sometimes worse then the stomach cramps. My flow varies but some months I can’t even get through ballet class without bleeding through a super plus tampon (1 hour 45 min). Is that a normal? As a side note sometimes when I sneeze or stretch a certain way I get pain in my right ovary area does anyone else experience this? I went last year to a gyn and in a nutshell it didn’t go well she was extremely judgmental and I didn’t feel comfortable at all. She told me that I probably just need to cut down on the carbs because I feel full. And no she didn’t ask how many carbs I eat each day. She did examine me a bit and I should’ve been more honest about how I was feeling but I didn’t know if the discomfort was just coming from her pressing on my abdomen or if it was something to be worried about. But I was very frustrated by that point with her and just left it alone. That was my fault. Since then I have cut down on carbs and tried eating healthier. I know exercise does help me and I am a dance major in college so I do live a pretty active lifestyle. It’s just frustrating that the pain is getting in the way of it. I take around the clock advil and it does help a bit if not for taking advil I probably wouldn’t be able to leave bed for the span of my period. I still experience a lot of pain even with advil. I have an apt with a new gyn coming up and am hoping that it goes better. Does anyone else have a similar experience? Do you think it could possibly be endo? Thank you so much to anyone who read this!:)