First of all, Jenn, I'm so sorry this happened. I've been hit by a car before and it is very scary. It took a few weeks before I was even able to get on my bike again, but eventually I got over feeling afraid.

Second, Massbike has a good article on their site about what to do if you crash. There is some Mass-specific legal stuff in there, but it's a good read for everyone, IMHO.

http://www.massbike.org/resources/crash.htm