You could try taking an antihistamine, such as Benedryl, at bedtime. I have a friend whose doctor recommended it. You could try taking the herbs Valerian and/or melatonin before bed. Try mediation or relaxation CD.
Do you know the recommendations for getting sleep? For example, use the bedroom only for sleep and intimacy, do not exercise for 2 hours before going to bed, do not eat for 2 hours before bedtime unless it's to drink a glass of milk that has tryptofan in it. So does turkey. Have a quiet down period before going to bed. Take a shower, read, listen to music, etc. Get sunshine exposure early in the day. It helps to set your internal clock.
I was just diagnosed with insomnia. I can go to sleep with no difficulty but was waking up every hour or two and getting up in the morning totally exhausted. My doctor prescribed trazadone. It works. I actually sleep thru the night and wake up refreshed. Trazadone is a common sleep aid tho it's not a sleeping pill. It was first used as an anti-depressant but left people feeling groggy. Taken in a lower dose it helps with sleep. It does make some people groggy in the morning. Thankfully, it doesn't do that to me.