Peeples: I had endometriosis when I was 29 years old. I had it for a long time before it caught up with me. I believe it was because I had an IUD inserted after my daughter was born 7 years prior. I blame the IUD for the problem, although I can't prove it.
By the time I knew I had it, I was in such bad shape I had to be admitted to the hospital right from the doctor's office. I had a total hysterectomy - they took my uterus and all ovaries - even my appendix!
The good news is that endometriosis is NOT cancer! It can be taken care of. Mine had gotten to the point where my uterus was filled with cysts, as well as my ovaries. I took a hormone for several years after.
I am sure your doctor will monitor you - I know women who have it and have not had surgery. I hope this helps. Blessings, Sparklea :)