Barbara
Please don't let a doctor tell you it is all in your head. I have been through the same thing. I have Mitral Valve Prolapse Syndrome and Dysautonomia. It has been the hardest thing that I have ever had to go through. I have found a wonderful group of doctors. What state are you from? There is help out there, but regular internal medicine doctors don't really acknowledge MVPS. So find a heart doctor or a MVP/MVPS Clinic.