Hey if anyone can help me with this question I will be forever grateful. For the past 3 Fridays of going out after work I have woken up each Saturday with a loss of 3 pounds then by the end of the weekend it is all back.

I follow the plan all week long (under 20 carbs, lots of water etc) on Friday evenings latley I have been going out with the gang after work for 2 beers. I drink the lite that has 3 carbs and I am including that in my 20. I eat a little more liberal than I normally do, possibly adding a few extra carbs or calories. I want to figure out what I am doing that is causing a loss, becasue other than that, I have basically been stuck at the same weight .

ANY IDEAS?