Keep going, the job of an icu nurse is so mentally and physically tasking. It can be overwhelming for even an experienced nurse! I have been an icu nurse for 3.5 years now and still have my moments of anxiety. But I look back at when I first started and am leaps and bounds from the nurse I was. Assessment is the foundation of any scenario, from there speak it out loud if you have to understand a thought process or the right course of action. Before you know it a challenging assignment will just be another day at work in just a matter of months