Hi all....   
 Guess What??  I found out that it was my thyroid ! It had completely shut down. Due to treatment. 
 My guess is radiation, since my throat was mainly the target.  I was tested and just started pills 2 days ago.  Will post again and let you know how things are going. 
So I am very hopeful my torture of the hot flashes & chills will be  over...!!  

   I am sure I will be able to recover much faster with much needed rest.
Thanks for all your input and help.
Diane