(((((Tara)))))
Endo is no fun at all

Unfortunately, I don't really know of any treatments that bring long-term relief.
I had adenomyosis, which is like endo, only it's inside the uterus only. I therefore only required a total hysterectomy to relieve me of misery. I do know people that needed ovaries taken out as well.
You may want to try checking out
Hysterectomy - HysterSisters
They are a terrific resource, whether or not a hysterectomy is the right answer for you. Gentle hugs sent your way....