I have drank red bull before and I have never experienced any problems with it, other than it made me jittery for a few minutes and then I calmed down.  Caffinated drinks dont do much for me.  The only thing that my doctor had informed me about thyroid problems was that since I had recently had a baby it could contribute to me having thyroid problems in the future or now.  We recently did a test and I am awaiting the results.  Good luck and I hope that you figure it out.  But I hope that if you are drinking red bull, you’re at least drinking the sugar free kind.  :-)

 

Liz