I have been having trouble sleeping for years. I have tried 10mg of melatonin which worked for a while then it stopped working. When I talked to my doctor about it I was hesitant to try another prescription since I had a prescription for Ambien in the past but I had nightmares when I took it. My doctor told me that I could try Benadryl. 2 Benadryl at night used to work but would leave me feeling tired and sleepy the next day. Now even the Benadryl is not working. I am averaging 3 to 4 hours of sleep each night but I am always tired so I need some guidance on what to try next.