I will be going through autonomic testing this week, and I'm confused about its purpose. Is the purpose to rule POTS in or out, or is it to see if there's some other autonomic problem causing POTS? This is for the testing other than my TTT, which I've already done. I'm basically confused as to whether they're trying to get to the bottom of my POTS before changing my medication, or if they're questioning whether I have POTS. I did a search and found a lot about what to expect, but I remain confused about the purpose of going through this.