This is extremely valuable insight for any creative pursuit! Fear can be a pretty valuable fuel source if you can learn to interpret it as such, rather than an obstacle. Even though I wasn't the OP, I appreciate you taking the time to write thisI know you posted this in November, but I'm just seeing it, now. I hope you've been doing okay! (I am applying to the screenwriting program, not the production one, FYI.)
I think it's impossible to forget about the outcome of your application. Your acceptance or denial is something you care deeply about, and, if you're going to be a creatively successful filmmaker, it's going to be at least partially because you obsess about both the little and the large things. My advice, since you asked for it, is to embrace these character traits as positives, rather than as problems.
I have a famous actor friend who has many of the biggest of big awards our industry gives. He still has doubts that he has any talent or ability. While he comes off as cocky and super self-confident, he's actually obsessing about whether or not he was any good in the last take and can he pull it together for the next one. But he has come to accept this doubt as a constant travelling companion, a given for his line of work. So, rather than trying to silence the voice that encourages negatives (DON'T think about that, DON'T say that line that way, FORGET ABOUT your application) he's accepted that the voice is never going away. He has, instead, turned it into a compass. The moment it says not to do something, he does it, with awareness. Because the obsessive nature of his doubt now leads him to actions that cause him to deliver great performances.
He takes the straw and spins it into gold.
So, in your case, maybe check for an email -- and then write about a character who is constantly obsessing over something. Anything. Doesn't matter. Knitting a scarf. A patient in a coma. Becoming the first American on The Great British Baking Show... Thing. Turn your current OCD into something creative. Use it as fuel for something larger. Let it strengthen you as a creator rather than weaken you. Then, each time you go to check the results of your application, add to the story. Even add another character and consider making this silly exercise into a draft of a dialogue scene for NEXT year's application, in case you don't get in.
Those are my 4 cents. GOOD LUCK AND HAPPY NEW YEAR!