Right before I quit drinking, my addiction counselor told me to expect about 12-18 months before my neurotransmitters (including wake/sleep) would be functioning normally.
This is one of the reasons I shelled out for the IV amino acid therapy. I was SCARED I wouldn't be able to hold out that long. Fortunately, the therapy worked as promised and I was "cured" of all those problems immediately. Slept like a baby immediately.
Whether you take the fast route or the slow route, rest assured that it does get better.