Help me please? :/

I'll be 11 weeks this Friday n about two days ago I got in a car accident nothing big just some jerk ran Me off the road n I lost a tire :(... I haven't really felt any growing pains or twinges like before normally I had them every day. My OB said it's nothing to worry about but I'd really like an ultrasound so I just go to E.R n tell them what happend ?? Or do u think it's normal...