I'm 22 and every couple months at different times of the day I go through spells where i'll suddenly get really light headed and start sweating were in a minute or two I'll be soaking wet. The last time it happend I couldn't catch my breath and both my arms and hands went numb and tingly and i could barely move my fingers. By the time I was able to sit down I was completely pale. usually when this happens I drink juice and after that the faint feeling goes away but I'm really shaky. Any ideas of what it could be?