I remember that feeling so well.
All I can say is that it does pass as you burn through your existing glycostores. But yes, it feels awful, like you have the flu?
Only thing I can recommend is more water and just doing what you can to take it easy. It will pass, life will be better in a few days.
Started IP March 1, 2012 Goal 1- 29lbs - March 27. Goal 2- 45lbs - April 25. Goal 3- 65lbs - May 29.
Goal 4- 82lbs - July 3. Goal 5 - 100lbs - August 7. Goal 6 - 129lbs - October 9. Break from October 17 to January 2. FINISH LINE - lose 153lbs - in progress. Forever in progress.