Hang in there! I felt the way you are feeling now and I clutched my computer like it would save my life - posting and reading here to get through it. Try riding it out. Urges pass even though it doesn't feel that way. Last week I had the same thing happen. I was standing at my back gate, coat on, keys in hand, ready to go buy wine. I stood there for seemed like forever while I debated with myself. I think I even broke a sweat. In the end I didn't go. I thought how great I would feel in the morning without a hangover. How far I had come. You can do it.
I find eating ice cream helps me. Or a diet soda. Just no caffeine.