28 weeks, car accident

Falisha

I was rear ended while i was at a complete stop. Ended up hitting car in front of me as well. I don’t think it was that bad, i haven’t seen my car myself but i was told minimal damage. Anyways, i went to OB and was surprised they wouldn’t give me an ultrasound. They just monitored baby for 2 hours. Is that normal? Should i request an ultrasound from my OB just for reassurance? Baby was moving a lot while i was at the hospital but was told that’s a great indicator everything is ok with him.