If you started masturbating and bringing yourself to orgasm consistently, your body just might heal itself. If the problem persists, then I'd experiment with Lupron and avoid surgery. Many women I've talked to said their sexual response was diminished after a hysterectomy. Go online to all the good medical sites and read up on Lupron, its pros and cons. They even have a website on endometriosis.
Radical surgery is always a last choice after all else has failed.
Treat yourself to some really great orgasms and see what happens.