Fatigue got you down? Some nurses work harder than others, that's just the nature of a specific unit. But, at what point do you say enough is enough? The performance and judgement of many nursing practitioners is dependent on a variety of factors, but chief among them is adequate rest. You can't make life and death decisions in the ER if you've worked 20 hours.
What are you doing to stay sane in and out of the workplace? Does your facility have policies in place that ensure their workers are adequately rested? If you do'nt your frustration, anxiety, and performance can suffer.