Hi all! I'm new here! I'm Meg! Anyway, let me get started with my question, I was diagnosed with Pots 2 years ago, but due to a terrible doctor, I was never told the diagnosis. Every time I went, they just told me a heart condition. I should have been more diligent but young and foggy! I started going to a new doctor and she explained everything to me, and I've been doing research myself. My question is, how do you know when your severely dehydrated? I've been having some less than stellar days, very nauseous, severe migraines, dizziness, sleeplessness, extreme fatigue, brain fog. Etc.. I think that I might need I.v. fluids, water isn't helping at this point. But I feel silly going just for feeling bad. Even though I've had it for a while, it's very new. I always thought I was severely depressed and had an issue standing. When my new doctor explained everything, I sighed with relief, I'm not crazy, nor lazy!