I think I have Endometriosis

So after some thought, extensive research and scouring the NHS page, It seems entirely plausible that I might have Endometriosis. My mother had it and, I’ve been having periods since I was around about 9-10ish, and ever since then i’ve had extremely painful cramps. The Light-headed, nauseating, refusing to move kind. Painkillers don’t help me and all I wanna do is lay down and wait till they pass because that’s all i’m capable of.

I’m going to see my doctor and discuss it with him, but i’m 15 and i’m so worried that i might have to live with this now, alongside my mental issues. Any advice??