Congratulations on 3 days Renvate.
It's normal for your sleep patterns to be a bit disrupted when you first quit (I was the opposite of you, I slept all the time) and the irritability and feeling of rawness should fade away soon too.
You mentioned stopping for a beer after work when you were drinking. I work graveyard and when I would come back from my shift, I would stop at the deli to get some beer. One thing which really was useful at the beginning was changing my route home.
I walked a couple of extra block so I would not pass the deli and I would not not go in impulsively. Like that if the idea of a drink materialized, I would have to go out of my way to get it which would basically turn an impulse fueled by the AV into a conscious decision.
Plainly speaking, it would have given me a few extra minutes to get back into my "right mind" and decide not to purchase alcohol.
Anyway, you got a sound plan and you are taking action!
Keep it up.