Nothing helps me sleep. Not trazadone, not ambien, not melatonin, not heavy psych meds.
What used to help me sleep was putting ear plugs in...those little soft ones. And I would do something every night to calm yourself down. Do NOT take a warm shower or sit at the computer or watch tv or listen to music. Do not drink alcohol or caffeine if you can manage it. If not, don't drink caffeine past noon.
maybe drink some hot tea? not caffeinated of course.
try not to eat dairy late. try not to eat 3 hours before you sleep.
if you take melatonin, take it on an empty stomach or with some crackers/bread.
try not to take it every night.
Hope this helps.