My wife had endometriosis, I tried every supplement on her and she tried all the meds from the doc. Getting a hysterectomy sucked for her but she said even with all the pain she had when she woke up from the surgery, she could tell that pain was gone and she was very happy.
I'm not a big advocate for surgery, but she felt so much better afterwards. She also kept her ovaries so hopefully she won't go through menopause earlier than she had to.
Good luck, from my wifes descriptions, it's a horrible thing to have.