you are having sleeplessness due to your night job. do not worry it is easily treatable. i am giving some suggestions to you. first try to maintain the sleep hygiene y the following activities.. 1] use bed only for sleep and sex. no other activities like watching tv reading etc. 2] do not take hot beverages and caffeine containing drink like coffee and tea before going to sleep. 3] go to bed only when you feel sleepy. 4] do light dinner two hours before going to the bed. 5] do some light exercise as slight tiredness good for sound sleep. but avoid heavy strenuous exercises as it causes difficulty in sleep. 6] try to maintain the time table. go to bed same time you used to go. 7] use flat bed avoid too much cushion as it decreases quality sleep. but avoid so much hard bed. above measures will help you a lot to get a sound sleep. if you have still problem than you can take single dose of mitrazepam before going to bed. hope my answer helped you . take care. plz rate the answer.