I would suggest you look into Melatonin as an over the counter supplement. It is a natural hormone our bodies need to adjust to the correct circadian rhythms, and it promotes restful sleep. It works like a charm for me, without making me feel like I am so heavily drugged up in the morning. It makes you feel naturally sleepy.
Remember my friend, "M"? She had tried everything short of tranquilizers to get a good night's sleep. I suggested Melatonin to her in one of our meetings, as a passing suggestion. Later that week her own doctor suggested it, and she then recalled I had mentioned it as well. She tried it and it really helped.