It doesn't slow down. It's all about perception. You keep checking dates and times instead of doing other things that will occupy your mind so you think it's going slowly. If you have a week, read a book, take a on a project of some kind, do anything and everything that will keep your mind off of it. Start anticipating closer to the date in question.

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"BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Will he offer me his mouth? BOY: Yes. GIRL: Will he offer me his teeth? BOY: Yes. GIRL: Will he offer me his jaws? BOY: Yes. GIRL: Will he offer me his hunger? BOY: Yes. GIRL: Again, will he offer me his hunger? BOY: Yes! GIRL: Yes. BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Yes. BOY: I bet you say that to all the boys!" -Meatloaf