This patient support community is for discussions relating to Dysautonomia (Autonomic Dysfunction) including: Postural orthostatic tachycardia syndrome (POTS), neurocardiogenic syncope, mitral valve prolapse dysautonomia, pure autonomic failure, autonomic instability and others.
It sounds as if you are having all of the appropriate testing, I hope your doctor is able to find an appropriate treatment for you. Good luck!