What Does Pain In Legs, Cramps And Constant Thirst Mean?

I have leg pain in both legs. Mostly cramps in my caves, but it can move all through out my legs. Also, I've noticed some pain in the bone of my bottom. Not sure if this has anything to do with my problems, but I'm constantly thirst. I have not been fully diagnosed, but am suspected of endometriosis. Going to the doctor tomorrow, but wanted another opinion. Thanks!