I've been feeling kind of bummed lately myself.
There have been a couple of days where I have kind of thrown in the towel, so to speak. I logged all of my food, but I went way over my cal range. The key is noticing when things are going south and stopping the insanity. Am I going to let a bad day or a negative attitude ruin all that I have accomplished? Heck no. So I guess I just kept my eye on the prize and got back in the saddle and all of those other cliches. lol
Try to find something else to do instead of eating. Journal, go for a walk, talk with a friend, or get busy with your favorite hobby. Painting, drawing, scrapbooking, whatever makes you happy and something that you won't regret later like EATING everything in the cupboards.
You can do it, I can too!