I had been lacto-ovo vegetarian for over a decade and I realized, once I started to eat right, that I was dealing with a lot of vit/mineral defficiencies from all that grain consumption. I think organ and bone broth consumption are super important in healing endo. I follow Terry Wahls diet pretty closely. Check her out.
Finally, stress reduction is huge! I found mindfulness and it has made a huge difference. And don't forget about getting enough sun, play, and sleep.
I like Yoga and also try to follow the primal exercise guidelines - walk every day, strength exercises 2-3 times a week, and sprints about once a week.
Good luck! You can do it.