I'm on my third day and I feel high (not in a good way)-- nauseas, light-headed, tired, fuzzy, generally weird. Are these feelings normal? Do they go away? I've been drinking lots of water (3-4 quarts a day) so I don't think dehydration is the problem. (My husband says it's psychosomatic.) I've also been feeling super light-headed on my morning runs. Thanks for your help.