Put your cake in the freezer until it is frozen. Crumb coat with a thick layer, let it crust (if your frosting doesn't crust place it in the fridge for 5 minutes) then frost. This should take care of your crumbs.
Good luck, post your pic when your done. 
Kat
Relax it'll be fine. Prep while your cake is freezing. This will help releave some of that stress so you don't fall behind. Sometimes if we walk away and do something else for a bit things aren't as bad when we return. I need to remeber this one too.
Kat
Wow I can understand totally what it feels like to be under the gun time wise and have things not go according to plan...no fun. Good news is this is an easy fix, take a deep breath and like the other members said...pop it in the cooler for a bit and you should be fine. Your cake is going to be beautiful, makes sure to post pics, it sounds great!
What is your recipe for your butter cream I had a similar post in which my cake fell apart and even if I tried to freeze it wouldn't budge....turns out my buttercream was no good I had not added enough shortnening. HTH and good luck take a breather, It will turn out great!!!! 
Finally finished. It turned out great. I had to stop and go have a tea party with my daughter then come back. Putting it in the freezer worked great. My camera is in my truck that my mom is using. The lady said she would seen me a picture. Thanks for all of your advise.
I'm so glad it turned out for you! I look forward to seeing the pic.
Kat
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