Is it hot today? Have you been drinking water? and last but not least are you taking any Potassium? The heat will dehydrate you robbing you of electrolytes you need, cheifly potassium and sodium. You should be taking pottasium during Induction and OWL (400 mg a day) - on hot days where you sweat more (especially if you are working out) you may need more.

HTH
Nat