i worked the twilight shift 4pm-10pm at ups for about three years while i was in college i felt this to my very core everybody at my college library looked so happy and excited to be able to stay all day and study and i couldnt keep my thoughts off of the fact that i would eventually have to leave for work  i am a lot better now though i have had my medication dosage increased to account for about 12 hours of the day instead of the original seven hours that i was trying to get by with it took me many years to work up the courage to ask for an increase because at the time it was becoming more and more popular for abuse by college students