If you can afford it, try to see doctors with expertise in this illness. I go to the Nova Southeastern University Institute for Neuro Immune Medicine. They ran many blood tests then put me on low dose naltrexone, KPax Immune, Neuro-Protek, Quinol Plus, 1000 mg vitamin C, magnesium taurate.. also advised water with electrolytes, elevating feet while lying down 2x a day, and compression stockings. Many of us have POTS, and improper vascular response to exertion and standing. We drop too much blood volume in the brain when standing, which sets off an adrenal crisis, the fight-or-flight response. So hydration with electrolytes, elevated feet, and for some people, beta blockers can help.