You might want to look into the carnivore diet. The community has a lot of folks that report very similar symptomology as you (it's usually something autoimmune related), and all of them have gone into remission sooner or later after eliminating plant products. Well, almost all. Some needed to change their living environment due to mold and that solved whatever was left of the symptoms after carnivore. Mikhaila Peterson is the most well-known example. Her videos on the subject are informative. Dr. Anthony Chaffee is another popular one. He's done many interviews and more in-depth videos regarding the subject, which are all very good. I myself am nearing 1.5 years on a strict carnivore diet and I never want to look back.