Only thing that helped my endo was getting that surgery (laparoscopy I think it's called? Sorry, english isn't my native language) and cutting away sugars and caffeine.
I've been the type with a "weak stomach" all my life. Every few weeks or so, I'd go through a day or two where I would vomit and have diarrea all day. It got better, actually felt GOOD, after a surgery I had for endometriosis, but it's back now.
I've been reading a lot about celiac, since white bread sends me running to the toilet. But frankly, I'm reading...