It sounds awful and I'm sorry you have gone through so much. I have EPGA and microscopic polyangitis, vasculitis. I bave neuropathy in feet and hands, I think it is part of vasculitis. I first had asthma which was manageable, then came neuropathy, I've had arthritis for a while. My doctor said those were all signs of vasculitis. It can effect everything. I would see a good rheumatologist.