Am I being too emotional about this?

I am twenty seven and have been diagnosed w/ endometriosis. I have had a laporscopy, and tried pain medication to relieve my symptoms as well as birth control pill among other therapies used to treat the illness. My dr recently wanted to start me on new medication call Lupron or one called Zolodex, however my ins. will not approve them because they do not believe they are medically necessary. Both medications would put me in a temporary menopause to stop my hormones. (endo grows faster w/ hormones) Since I can not get my ins to approve it I have decided to go ahead w/ a hysterectomy (another treatment for endo). I have put it off thus far, but realize it is probably where I will end up anyways. I do have two children, but am still uncomfortable w/ the fact I will never be able to have another one, even though it is unlikely w/ my illness. I have been really upset and no one can understand why. It seems everyone around thinks I should just suck it up and get it done and over with. And none of them can understand this will not cure it! It just slows the growth. I feel I will be different some how or my relationship w/ my husband will be different after the surgery. I feel like I will "loose" a piece of myself. Should I feel the way I do or am I just overreacting?