Imposter Syndrome and facing Dying patients on a surgical ward

Never have I ever faced a dying patient on my ward, until this week that is. In a week full of struggles, difficulties, and most of all Imposter Syndrome.. I really wonder what my role is. It seems to me that I am doing a lot of stuff not even related to my degree. On the other hand, I get told off for trying to tell other people what to do. Why is life so hard sometimes?!