Don't despair. First, you probably haven't gained that much back, some of it is bloating from eating unhealthy food. Gaining a pound means you ate around 3500 calories more than what your body used for fuel. So, actually gaining 11 pounds would be eating 13,000 more calories than you needed *every day*. Even living on twinkies isn't going to get you to that number. And you are not fat, pathetic, or a loser. You went through a hard couple of days. Anyone who has ever been on a diet has backslide for a few days at some point. You are simply human. And now, you are going to get back on track, eating healthy and exercising, and in a few days you will see that you are doing better than you thought you were.