What Can I Do To Treat My Worsening Insomnia, Especially Since Melatonin Doesn’t Help And I Suspect Tykeson May Be Contributing?

I have always had a problem getting to sleep. Lately I can be up til 2:00 in the morning. I take melatonin and other natural vitamins with no luck. I am 79 and has gotten worse with age and lack of activity. I read tykeson can cause insomnia and I definitely have it. What can I do?