@mrstigger49 have you ever been to a dysautonomia clinic? Take low dose hydrocortisone was once suggested to my daughter, who nearly faints with heat and has several autoimmune issues. Have you seen a cardiologist- I assume so in all this time! Functional medicine MD's were also helpful to my daughter.

I have been reading about limbic system training (Primal Trust looks like the best online program) and vagal nerve training with breathing and touch (polyvagal theory) for some of my own issues. Basically trying to address brain to body and body to brain, if you will. It's a lot but interesting.

I fear my response is not helpful but wanted to respond anyway because this is difficult- and you've had it a long time!