Sounds like maybe an adrenalin charge or tremors TidalWaves. I know what you mean by the feeling hot then cold, at the moment I'm having hot sweats continuously during the day. Tremors have stopped today........how long for i'll never know!!
Thanks for your comment Sherri....it feels relentless at times doesn't it

It does get better I'm just post now and over the last year tremors, palps, buzzing etc has become less intense compared to when they first started. I say that and yet my hot sweats are quite well... HOT
My doctor told me it could be years!! As long as I don't go back just keep going forward......tomorrow will be better than today!
Cheers choco