OH DEAR....That darn scale will get ya everytime! I quit believing in scales when I gained 8 pounds over a weekend and lost 5 pounds in a night. These things can't seriously be possible?!? So often I have been dieting and doing great and then the scale says I'm up 2 or even 3. It is so frustrating! I just try not to internalize it and keep up with the good habits. Deep down you know if you are really sticking to your plan and give it some time, the scale will eventually go down and stay down.
And for the record, even though everyone will tell you this, it might be the TOM affecting you, water retention, PMS or even muscle gain

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Don't stress and stick to it!!! And I'm with ya, don't even move that ticker back becuase you know this is just a fluke and those pounds will be gone again - very soon!