I still get occasional periods of sleeplessness. It frustrating if I have work the next day. Once or twice I have stayed awake all night and decided not to work the next day. That's life. Sleeplessness is not restricted to alcoholics either. My wife sometimes has sleepless nights. Not everything that isn't ok needs instant fixing.
I try not to drink anything with caffiene in after 5pm. Even sugar or eating late can mess me up. In my early days I stopped reading the big book before bedtime because it started me thinking and turning things over in my mind.
Food additives, caffiene, sugar, poor diet, lack of exercise. All these things can contribute to a poor nights sleep (and poor thinking).