Melissa, Thanks for the nice hello, I am not sure everything I have yet so far I know POTS, Mast Cell Activaton, Im Hypovalemic, OH, Syncope, Fibromuscular dysplasia. i am kinda lost still to everything. I was hoping mine would get better but over the years it has just gotten worse. And everytime I get one symptom controlled ( or get used to it) another one happens. It is so difficult to deal with. Well, thanks for being so welcoming.