When my anxiety was at its worst, I would wake up in the middle of the night, my body felt like it was on fire. It was start in my head and spread all the way down to my feet. It was the scariest feeling and I had NO CLUE what the heck was going on. My skin would get all blotchy looking, too - especially around my neck. I still get a cold tingling on my scalp at times or a burning on my wrists (wrists/forearms turn red). I'm not sure what to think about it, I keep freaking out that I'm getting arthritis, but from reading about it, it sounds like anxiety can cause this, too.
I had the wired feeling, too - I would literally pace back and forth in the house, couldn't sit still and my brain felt like chatter. Or, other times, it was like my head went blank and I would get this dead feeling in my forehead - not sure how to explain it, but it was sooo scary. It has to be anxiety because I've had every test, every scan and everything is pretty much clear. I do have a neck injury (whiplash) so I'm assuming my nervous system was affected and because I already had anxiety issues, it just made them spike.
My best advice...stop googling - it only makes thing worse.