Welcome....
If you can't sleep....and I could not during my initial de toxing
please do try to relax with a warm shower/bath and
pleasant calming music. Just rest as best you can.
Here is a link that might help
Insomnia? 42 Simple Tips to Help You Get to Sleep - Insomnia treatment, cures
Did you check with your doctor about how best to quit?
That's always a wise idea.
Wishing you the best a sober life offers...