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.
Did you mention before the possibility of getting checked out a Mayo for other possible conditions besides POTS? If I were you, I think I would continue to pursue the possibility that something else might be going on as well, considering the neurological symptoms you are having. Hopefully a major diagnostic hospital can sort it out.
What is your actual blood pressure and heart rate during these spells?