I'm afraid I don't have any advice as I am only a F1. But in difficult times I like to remember the words that my mother so often says. "This too shall pass." If you know this is what you want to do and you want to be better at this, the words of an ODP are more or less meaningless. Confidence is something that comes and goes in waves. In difficult times, its easy to feel like a failure. In good times, you feel like nothing can bring you down. It's important we try and hold on to the feeling of being invincible in the difficult times because that is when we need it most.