Hello Sameer,
It's 5 months for me on the 15th. BTW, CONGRATS! I wouldn't trade it for anything. I sure understand your insomnia though.
Although I'm not in any way certain, I've been told it can take up to a year. the only thing i know for sure is after drinking for such a long time, it mmay be understandable it will take a long time to get back where i started.
My body still must think it is still in an arousable state. I'm going to see an endocrinologist in a few weeks to see if he can ascertian anything.
Good luck to you!
BTW, a good book is Desperately Seeking Snoozin.
I manage to sleep a few hours ( 1-3) every 3rd or 4th night.