It's tough to break that self-medicating mentality, but you can do it. It will feel wrong at first... at 5 days your mind is still going right to the bottle for answers. You can retrain it by deciding against that drink, again and again. Each time you decide against it you are creating a minute amount of progress...
Just be okay with today sucking - nothing has to happen as a result of the day sucking. My day has sucked pretty badly too
You know what works for me though, is gratitude. I know you might roll your eyes when you read this, but thinking about what you have generates better feelings than focusing on what pisses you off.
In early sobriety I would call my sponsor and tell him how overwhelmed I was with it all, and he would say "hang up, write a list of the first 5 blessings you have that come to mind, and call me back." Seems cheesey, but it works if you let it. Hang in there - sucky days suck indeed, but a sucky day tomorrow will suck more with a hangover...