I'm running a triathlon tomorrow

If you've been around for a while, then you'll know that I've signed up to run a sprint triathlon. I also signed up to participate in one last fall, but I broke my arm shortly before the race and was unable to participate.

You guys. I'm so nervous. 
I've been practicing these rules and training since January/February, but I still feel like I should be better prepared. I've been swimming in a pool but we are JUMPING OFF A BOAT into the river. Not that I'm not acclimated to river life, but usually we're on a lot smaller boat with a fishing pole and book (an an occasional adult beverage) in hand. Not jumping off the back of one to swim 400 meters to shore. 
Not only is this the first race (of any kind) that I've participated in since I was 16 or so, but this is the most challenging thing I've ever done. My best 5k time was under 29 minutes, when I was 13 years old. That was eleven years ago!
Now, at 24, I feel unsure of myself. I feel slow on my feet. I feel unsure of my biking skills, and I'm really praying my goggles don't come off my face when I dive in the water.
All of these things are kind of making me not want to get up in the morning.
But I will. I'll be up at the ass crack of dawn to put myself through the biggest physical test I've ever put my body through. And you know what, I may crawl across the finish line, but I will finish. I know none of you will be there, physically, to cheer me on. But if there's one thing I could ask of you, it would be for words of encouragement and prayers for strength of body and strength of mind (especially strength of mind) because I know this is going to be HARD. 
I'll be back next week to let you know if I lived through it or not. Also I'll be one of those assholes with a sticker on the back of my car, informing everyone that I've done a triathlon.