The results were decided the moment you turned in the test. Worry is just reading a book that’s already finished.

Once the paper is handed in, the outcome exists; the only thing missing is your knowledge of it. Worry behaves as though the ending is still being written and you are helping with it. That is not influence, it is discomfort with not knowing, and it buys nothing. The grade is identical whether you spend the week calm or wrecked.

Separate the two questions you are carrying: what the result is, and whether you can do anything about it. If the answer to the second is no, let the first one wait. Put the hours into the next thing on your desk, which is still unfinished and still yours.