Hi Cheryl and welcome! This is a great topic, alas one that i haven't explored before. But your problem with Nightshade plants, tomatoes and potatoes sounds very familiar. i know I read about it in an auto-immune group when I was trying to figure out what I had. I'm thinking maybe the lupus forum? So if those items can cause problems to people with an auto-immune disease, it would make sense that they would be problematic with people with fibro. Have you been tested for any auto-immune diseases? If not, it might not be a bad idea to do it.
I don't really have food issues, I don't think, except for GERD. I see that others on this thread have far better advice than I do so I'll let them have the floor!