I just have one thing to tell you:
what comes after graduation is not going to be as scary as you think that it will be. You will graduate, put out your resumes and find a great job that you love to do. Right now, I'm doing the same thing, only backwards; real world first, college now. And truthfully, you did it the easy way the first time. Doing it backwards only lets you realize where you should have been and what you should have been doing (going to college and getting a degree) in the first place.
I know that you'll do fine, and you have the support of all your friends, and of course, the GC fam. Now, go listen to some music, eat tons of junk food and chocolate, and leave the worries behind for a couple hours.
