I have most of your symptoms, but never woke up in a sweat, and my migraines are usually in the morning. You got a lot of good advice here. You probably already started with a neurologist. Next will be a rheumatologist. Many of us here have the buzzing. Its scary at first, but don't let it get you upset. It is important to stay calm. The nervous system is like circuits and electricity. Being upset and scared seems to rev things up and make everyone's problems worse and many of us have to learn the hard way, but it's good advice. I was diagnosed with small fiber polyneuropathy. The skin biopsy is a test done by a neuromuscular neurologist. It took a year for me to get to the right doctor and it is an easy procedure. Also, if you are having autonomic symptoms, you might need the tilt table test.