For about 2 weeks now, I have been awakening with a very strong pounding, racing heart, the very worst of which lasts usually from 1-3 hours. I have nausea and a complete loss of appetite, along with very loose, yellow stool. I am trying my best to eat and drink, but it can be difficult. My doctor so far has checked my thyroid and I believe has done some general blood work, as well as an HCG and stool testing. I believe the only thing not back are the results of the stool sample. I feel generally shaky and nauseated throughout the day, my heart rate seems to be elevated and stronger than usual pretty much all the time, and my palms are sweaty. The worst of these symptoms is in the morning hours through early afternoon. Any opinions or advice would be greatly appreciated. Thank you so much!!