Here is just my thought and I could be wrong but I have a little more background of you-- then others -- now your qsart test for sweat came back abnormal and with your previous symptoms like heart racing and you rest pulse being high to me indicates a form of neuropathy even if its not sfn its does seem automonic neuropathy ---example damage to the nerve that supply the blood would effect blood pressure and body temp...i forgot does ur blood pressure change via sitting or standing?--- I also remember u had a problem at movies --with your resting heart rate 2. I know u execise do u get any unusal shortness of breath when you do ? You heart rythms can be faster or slower with this too. Hopefully --Glenn chimes into to help me here a bit. Have u been lossing any weight without trying. What does you DR say??