thanks, dowa. i had my histamine levels checked several times, as doctors thought a lot of my symptoms sounded like mastocytosis. they have always been normal. i have also been thouroughly checked for neuroendocrine tumors. my doctors, of all my symptoms, definitely seemed most interested in the facial flushing because it came on very suddenly and very intensely. this doesn't fit the picture of a flushing disorder like rosacea. it has now just been chalked up to autonomic nervous system dysfunction, as all my symptoms have been, but doctors can't tell me what kind of autonomic dysfunction. i have been diagnosed with a "POTS-CFS-like syndrome." pretty vague.
anyways, a bit off topic, but i am wondering if facial flushing occurs with lyme's. it has been one of my most prominent symptoms, and especially because it was worst in the beginning of all this. if this doesn't fit the profile of lyme's, i think i'd hesitate to see a llmd.