Wow, that's rough.
Hope you heal up and can get back out on the bike - racing or not - before too long!
Btw I wouldn't worry too much about what you could've done differently preceding the crash, if anything - sounds like you were just in the wrong place at the wrong time. I'm sure someone will come on and say they would've avoided it by being in the drops or something, but sometimes you just can't avoid crashes like that..