you've gotten some great advice.
i'm also on trazodone. it's an AD but also can put you to sleep.
i turn the lights out an hr before i plan to go to bed. that gets your melatonin levels to come up.

have you tried anything like tylenol PM? check with your dr before trying any drugs. if you do try it NEVER overdose on it. tylenol can have serious or life threatening side effects on your liver.

you also might try something that works as "white" noise. or some really relaxing music.

and, don't nap during the day.
boy, good luck.