Oh yes.
From 'brain mush' to brain fog was sure how I describe what happened to me.
However, you are mentioning dizziness when you sit up quickly and that raises some 'red flags', enough so for me to say
Please consult with your doctor and be honest with them. How much you were drinking, when you quit, etc what is happening now.
Please get it checked out to be on the safe side.
J M H O
Love and hugs,