T.H.
S.,
CALL YOUR OB RIGHT NOW. And insist on an appt. Your OB will probably want to see you ASAP if not sooner. They take accidents seriously, especially auto accidents. Call your insurance company and give them the name and phone number of the gal that hit you. File a police report now.
There can be damage done internally that you don't feel now that could actually be harmful to your precious baby.
For future reference, stay at the scene of the accident, call the police to come to the scene, get all the insurance info of any parties involved in the accident and get the names of witnesses to the accident. This woman may have given you a false phone number and name. If this is the case you are stuck and it may come down to your word against hers as to who was at fault. A witness could have backed you up.
Hope all works out for you. Try not to be so worked up. This is not good for the baby either. (Blood pressure etc.)
Best wishes,
T.