I've found it works for me most of the time, but I have to really give myself permission to wallow in my misery. Sometimes that gets me out of it faster, because I start to get amused at my own melodrama.

And I would cook for you were I nearby, but alas I am not. Try and get your healthy stuff in, and don't worry too much. I am currently ignoring my weight while I work through the physical therapy, because I simply can't workout to the intensity I need and it's driving me crazy. That's enough to worry about.