Hi Tizz
Don't be hard on yourself, I don't think you're pathetic at all.
With work, you're doing a good job on day two and definitely stay mindful of why you've made this decision. When I go into supermarkets I chew on gum and that seems to help beat the craving a bit. Since you work there, I really recommend what Bookmaven said about maybe leaving your cash and cards somewhere relatively tricky to get to from work. The more distance and time you can put between getting the craving and buying the booze, the more chance you'll have of avoiding that autopilot feeling.
We are all here to support each other and have faith in yourself. Come on this forum when you can (I have the mobile app so that's handy if you can get it) and post, post, post if you need to!