When Does The Brain Fog Go Away?

I (F30) smoked on a daily basis for over 9 years. I am now day 16 without any cannabis products. The longest I went without smoking before this was 7 days, and that was years ago. I have horrible brain fog and have difficulty remembering words sometimes. I thought the dissociative feeling would be starting to go away by this point but it’s still heavily with me. When did you start to come back to yourself?