I've got two ACs next week and I am starting to get overwhelmed with information. I had an interview last week with a different firm where I was unable to answer a competency question and I didn't answer two commercial questions how I would have liked

, and it's stressing me out that maybe I don't know as much as I should. When do you know if you've done enough? I know you cannot prepare for every single thing, but the more time I have, the more I think I should be doing more competency examples, more firm research, etc