get some sleep

i’ve done everything people recommend (cut down on caffeine and alcohol, go to bed at the same time each night, wake up at the same time each morning, take a bath, drink warm milk, etc) and nothing works.
i’ve tried melatonin, trazadone, restoril, ambien, and more and they’ve all stopped working.
i lay in bed waiting to sleep and instead i see day light first.
my shrink says i could just have a different cycle than other people.
but how do you function properly if you can sleep properly?
i’m not willing to work night-shift because i’d never see my boyfriend, but how to i get and hold a job when i can’t sleep normal hours?
i just want to be able to sleep like a normal person!