I had drink-dreams for months. Would wake up certain I'd been drinking and As terrified as hell that I'd messed up.
I say months, might have been as long as the first two months.
They go away after a while. Vitamin B was a life saver in the first few months that seemed to help.
It does take a while to find and learn your natural sleep pattern. It's like getting a new head, you have to find the new controlls!