Nikki- I hate to say this, but I could not help laughing when I read what happened during your run. That is normal, it happens... and (most likely) will not happen during the race.
You will be fine. Don't worry and do not really worry about your time. Run your race, pace yourself where you will have enough in the "tank" for when you come near the finish line (I love it when I have enough to sprint to the end... but almost collapse when I cross - it means I paced myself right)
You have family that will be watching and enjoy the fact that they are there. On Thanksgiving, I will have my wife, 3 kids and in laws all there. Of course, they are all wanting to watch the girls and I am an after thought to them - but my daughters really get excited to see daddy run (same thing for when I play softball).
Again, you will be FINE. Do not worry and enjoy yourself. Your times are fine and even if you run a 10 min mile, if you finish it... you should be happy. Just remember what you did and try to improve for the next time.
As for the nutrition, the guy I was talking with last night is actually the local HS indoor track coach... so I picked his brain and what he does (he cannot run, but does work out with the kids and also refs hockey games)
1) He suggested to load up on carbs 2 days prior (the proverbial big plate of pasta). It will be digested and ready to burn off during the race.
2) Within an hour after the race, load up on protein and sugar. He recommended something in a liquid form as it will digest faster and help with the recovery. If you have to make something and then eat it, it will take much longer to get into your system.
3) He makes a protein shake after workouts. He said he gets about 45-50 grams of protein in the shake. One thing to note, the amount of sugar is unreal. But, he says, it helps with the absorbtion and metabolism of the body to lose fat and build muscle. It seems odd to have a shake after running (shakes are usually not healthy) , but he said he actually lost weight by doing this right before bed.
4) Hydrate.... Hydrate... Hydrate....During, before and after the runs. Try to at least take in the 8 glasses a day, but it should be 1.5-2x the amount because of what you sweat off. A sports drink is a good option as it will help replenish things in the body that you lose in the sweat.
I know some of these seem obvious... but easy to forget. After my 10 mile run, I had stomach cramps and figured out after the fact that it was because I did not drink enough.
By the way Nikki... Have fun and do not worry. You will be fine.... (get the theme yet? ) 
CitiCorp 5K Heart Run : 25:49 Finished 13th, 2nd in my class! (though, only 43 racers)
2009 Turkey Trot : Hagerstown 5K 25 minutes 27 seconds... another personal best! Results pending before I know where I placed!
Check out my Blog : My journey to the Ultra Marathon....