L.Z.
You might try a chiropractor - they do much more good than just for the lower back. Plus, being aligned and in good balance will help you deal with pain better all over, maybe even easing your symptoms a bit. I don't have endometriosis but I get awful PMS and visits to the chiro help ease some of the aches and pains I get before my period. I also have heard great things about holistic doctors like homeopaths to help with a variety of issues... might be worth a shot or worth looking into. Good luck and hope you feel better soon!