Ironically I happen to be on an overnight shift now, and it's very hard for me to stay awake. I agree that 3a and beyond is my breaking point. I work private duty and the patients I care for on the overnights are pretty stable. I don't have much to do, I bring my iPad, read, watch tv, but there are times that I simply cannot keep my eyelids open. I recently told my office that I will no longer work nights because I am afraid I will make a mistake. It's a lot easier to foul up when your tired. Even if I dose off for only a few minutes and get this major guilt trip. I want to do my best at all times, and if I don't I just harp on it. I really hate making mistakes even though I know I'm only human, and being tired just increases that chance. Plus I feel nauseas at the end of the shift a lot. It's just screwing up my whole schedule and its hard to work other shifts, all I do now is work and sleep. I can't seem to get in the groove.