Heather I’m sorry to hear of your frustration with getting proper care. Just wanted to chime in here and say that I experience some of the same symptoms you describe. I do not have a diagnosis as yet. The symptoms of sweating and shaking are most intense and paired with pressure in my head… (no way i can do a treadmill test!). My medical investigations are looking at a cranial CSF leak. I have family history of connective tissue disorder and thoracic ascending aortic aneurysm (mother and one brother), among other presentations.