Last night was a strange night as I actually slept most of the night restfully. Than I woke up at 6.45 in a pool of sweat and had a full blown panic attack, shaking, needing the bathroom, and all the horrors a panic attack has. It wasn't blood sugar as I am not eating simple carbs anymore and blood sugar is normal. I am thinking rush of adrenline due to dehydration and orthostatic intolerance. Anyone else have this? I don't usually sleep much at night and get up and down, so I am wondering if this movement probably keeps the low blood volume moving but a restful night doesn't. Any thoughts would be gratefully appreciated, as I suspect this is POTS/ NMH related.