Why Do I Feel This Way.....?

This sounds similar to my symptoms. I have had what you are describing and more. The neurological symptoms I experienced led me to go to a neurologist. I was diagnosed with Autonomic and small fiber neuropathy, which I later found, is a symptom of Late Stage, or Chronic Lyme disease. It sounds like they need to change your dose of beta blocker, because once they got that right for me, it is very seldom that i have issues. I was put on a beta blocker for it, so save your time and money and skip the autonomic testing and pursue looking into Lyme disease. Most Doctors are very ignorant about the disease. You need to find a LLMD. Autonomic neuropathy can be acquired or inherited. I never tested positive for lyme either, but I have no doubt in my mind that I have it. I have been blessed to find a Dr to treat me, with a clinical diagnosis.