Keep your head up. It sounds like you are committed to this choice of career, so prove it.
I sit on the hiring commitee for my Department, and trust me, if you made it that far, you have a very good shot at making it all the way. Keep in mind...10% of the people they offer the job to will turn it down. That leaves about 33. If the academy is anything like here in CA, they will wash at least 5 or 10 of those in the academy. What I'm trying to say is: its not as bleak as it seems right now. They just kicked you in the nuts....you've been kicked before. Drive on.
Also, I think Sukebe gave you some good advice. I suggest you follow it. Learn now, sometimes you have to hold admin's feet to the fire.
Good luck, and remember, we need good people in this profession....we want you to succeed, but you have to man up and prove you deserve to belong.
We'll be thinking good thoughts for ya.