I've Been On Temazapam For Insomia For About 20 Years

I've been on temazapam for insomia for about 20 years but it only gave me 4 hours sleep a night, my doctor recommended trazodone 50mg. For 2 nights since being on trazodone I've had no sleep at all. Before I take it I'm very tired and then when I digested the drug I'm no longer tired and I don't sleep at all. I've had a sleep problem for most of my life, I'm 85 years of age, do you have any suggestions?