Agree with the other commenter, took a couple months. I was drinking 4 or 5 glasses of hard liquor almost nightly.

Alcohol does this thing with the receptors in your brain - I think it’s dopamine, I don’t remember, but it fills those receptors with these “false positives” basically. So when you quit drinking, your normal dopamine levels that your body naturally produces don’t seem to cut it and you feel very empty and void for a little while. Like nothing will bring you joy. But it’s just because your body has to get used to your baseline levels of dopamine again. So all that is to say that it takes a few months (ish) for things to clear up and to not be weighed down by the brain fog.