I know there are others who have talked about POTS on here before I would do a search for it at the right side of the page. Sorry I am not much help lol my rheumy told me that I have autonomic involvement with my lupus so I assume that it could be the cause of your POTS as well.
"A bad cold wouldn't be so annoying if it weren't for the advice of our friends."~ Kin Hubbard
Diagnosed: SLE, Raynauds, InterstitialLung Disease, GERD, Myositis, Vasculitis, Possible Sjogrens.
Medications: 400mg Plaquenil, 2000mg Cellcept, 10mg Norvasc, Nitroglycerin Patch, 20mg Prilosec, 10mg Flexeril, 4mg Medrol, 81mg Asprin.