to elaborate I have been experiencing the same symptoms as 2fast4u off and on . I think that you hit the nail right on the head with your answer . I too lost a little weight on alow cal diet and I think that it did some damage to my body ,not to mention the amount of muscle that I lost .I am now gaining muscle along with losing fat so it does get confusing sometimes when the scale doesn't move . thanks for the heads up. I hope that 2fast4u takes it to heart as I know I did.