I feel nervous about my exam

I am training to be a relationship coach (with a different company to this one). I have my certification exam coming up. I think I do a pretty good job at coaching and Im pretty confident I can always get the client to a breakthrough. The thing is, I want to do an extraordinary job in my exam. I know that the main thing that stops me from being extraordinary and super present is fear coming up in the moment. How can I feel like its true, like I really truly believe that I’m an extraordinary coach and go into my exam feeling confident without too much fear?