When you drank for as long as I did and as much as I did, your brain becomes scrambled eggs. Amazingly, I was sharp as a tack because I was used to it. When I quit drinking and my brain started to unscramble, I wasn't used to it. I got confused a lot and lost my place a lot - brain fog. Even up to six months I was experiencing 'brain fog'. But eventually, I don't remember how long it took, everything was normal again. It varies person to person and drinking history has a lot to do with it. Just know that your brain will heal. It is a good idea to play 'brain games' or do other activities to keep you on your toes. Believe it or not, even something like putting puzzles together helps the healing process.
You'll get there, don't lose heart.