#1: Don't step on a scale again until you are sure you can look beyond the numbers.
#2: Buy yourself some new clothes in the right size. You are not fooling anyone by squeezing into clothes that are a size too small; in fact, it's just making you look more foolish.
Most importantly: You're not pathetic. You're not a failure. The inside changes you're working on are the result of a lifetime of programming. It's going to take more than a week to get yourself deprogrammed. If you have to, "fake it 'til you make it." And keep coming back.