I have been diagnosed with POTS and Chiari Malformation. I recently saw a rheumatologist and she said vitamin D was low. ANA is negative and DSDNA is negative. Lately I have been feeling awful. I have not really had any testing except a tilt table test. I take Florinef and Prozac To help with the POTS. I have a dr appointment Monday to talk about medicine and seeing if we need to switch, increase etc. can you recommend any test to ask for? I do not know what type of POTS I have. I also do not sweat very much. I have excruciating body pain. The rheumatologist was supposed to be talking to me about fibromyalgia, but I was not confident in anything she said. Her answer was to “take a tylenol”. The Flares have been so frequent lately thank you!