Is it possible that I have endometriosis?

So I'm 18 and I have had a lot of issues with my period. I tried to do the birth control pill, I tried every brand, different doses, etc. And I bleed constantly on it and get super sick to the point where I am vomiting and super fatigued. I was on one for 6 months and constantly bled for 6 months. I have also been getting really bad period cramps. So bad that I cant even stand up straight and no medicine works. The pain gets so bad that nothing can help it, it's like a sharp pain that is constantly there while I'm on my period. I can barely eat on my period. I also get my period 2-3 times in a month and it is always super heavy bleeding (usually bleed through a super plus tampon in 30 minutes or sometimes less). I've been in and out of the doctors office trying to figure out what's wrong, I definitely do not have any STDs, I've only had bloodwork done so far, so I'm going to ask about endometriosis. I'm probably forgetting some details so feel free to ask questions. I just want to know what you ladies think. Could this be endometriosis?