Binah, u r welcome.
Many practitioners advise people with auto-i.d. to avoid certain foods. People with lupus (also an autoimmune disorder, as u’ve correctly pointed out) avoid eating alfalfa, among other things.
People with Hoshimoto’s disease avoid gluten, etc.
Experiment with different foods and see if you notice a difference. I know someone who had something similar to what you describe, and for her wheat was the culprit. For you it may be something else. Just keep testing till you figure it out.
Hatzlacha!