Disappointing

I don't know why I am so disappointed in myself. I got an A- and a B+ those are very good grades, especially considering how much worse I have done in the past, but I want to be a GREAT interpreter and I want to pass the NIC with FLYING colors, and the grades I got on my finals just didn't illuminate that enough. I don't feel confident anymore because the grades struck my confidence down. I am sure if I talked with her about it she would be able to explain why... and maybe I was still one of the best...but maybe I wasn't and that's the part that concerns me the most.