Let's see, I feel terrible in the morning, terrible while I am at work, and terrible at night and then I wake up all night long!! LOL Things are pretty black and white for me - when I am feeling good, I am relatively symptom free, except for the tachycardia, light-headedness, and sesitiviity to heat, strong perfumy smells, and overly busy environs - those never leave me. When things are bad (flare), they are bad all day long and all night long and I experience 80% of all possible POTS symptoms. By the way, I still exercise. I have never felt any better or worse as a result. I keep doing it, because I am afraid I will get worse if I stop.