Hopefully you have figured it out since this was posted a year ago. But I suspect its due to a pheochromocytoma. Its a rare tumor found in your adrenal gland. It produces and secreets massive amounts of adrenaline, epinephrine, metanephrine in your system. It took me going to 49 Drs and them telling me I was crazy before mine was found. I was literally dying. Had blood pressure of 220/140 every day even though I was on 3 BP meds. I was having "episodes" the Drs called them panic attacks and said I was drug seeking. of course I looked like a druggy because within a couple months I was down to 85 pounds. I stopped sleeping, stopped going to the bathroom. I sweat like crazy but my hands and feet felt like ice. My joints were bright red and inflamed. ANyway, it was not fun.... iuf you have any of these symptoms, I would ask for a 24 hour urine analysis and CT scan.