I am really upset right n...
I personally wouldn't worry about 2 lbs. Could have been the weight of your clothing, if you had liquid before you weighed (like a big coffee, water weight), variances in scales, how much...ahem... you have going through your intestines at the time etc. 10 might be a cause of worry, 2 is largely insignificant for the above mentioned reasons.
~KD in WA