I have lost so much self confidence at work over the past few

I have lost so much self confidence at work over the past few weeks. I can't explain it other than I just feel so royally *stupid*.

I'm afraid of my new job. Afraid of taking care of step-down patients. Have that horrible imposter feeling. Don't trust my judgement, don't trust myself. I was once able to make quick decisions about my patient care, but have just been beaten down by this one nurse who is very experienced but wants things done "just so"(her way). I second guess everything I do, standing paralyzed.

I'm afraid of not being able to do the new job. I'm afraid of f'king this entire thing up.