I've had similar symptoms, but what happened to me is the numbness would start in my fingers and work its way up my arm then to my head/tongue, and sometimes I'd notice something funny with my vision, you know when you look into a bright light for a while and a halo effect appars, my tongue gets tingly and numb like and sometimes it even affects my speaking and I feel confused sort of if that's the right way to describe it, I'm thinking straight in my mind but the words just dont want to come out fluently? <img src="i/expressions/face-icon-small-confused.gif" border="0"> If I let it go this far then comes a crashing migrane and sometime nausia. I thought it may be signs of diabetes but everytime I've checked for this it's negative. I've researched it and read that sometimes your energy stores can get low and cause these symptoms with CFers and at the initial onset to have something sugary like a soda or juice. I've tried this and it seems to do the trick, every once in a while I still get it. Maybe give it a try and see if it helps.