11 pounds in three weeks is not healthy weight-loss. Anything more than 2-3 pounds a week is dangerous -- it can affect your metabolism and your body will begin to catabolize your muscle.

Given what you ate (very few dense carbs) I'm pretty certain that your body is in glycogen deficit and that some of your initial weight-loss is due to a lack of water in your muscles.

Try to be patient with the process. We should train (and lose weight) for life, not a short-term goal. Remember, none of us gained unwanted pounds overnight and none of us will lose them overnight either.

Also remember that we experience cyclical fluctuatins in our weight from day to day and within the day. This can be attributed to water weight (ie how much water we're storing in our muscles along with glycogen).