that sucks but its good you didn't get hurt too bad and you'll probably end up with a new car out of the deal.
it sounds like you're also owed some dough because of that pain. step one is to see a doctor right away to get it documented, also take pictures of any bruising etc. with you're digicam. months down the line, nothing will speak louder during the settlement phase than photograpihc evidence.
and get a good lawyer. if possible, get one that you're friends or family had a good personal experience with. either way definately get recommendations and learn exactly how he is going to get paid (i.e. fee, commission, etc.).
good luck bro.
-w