Hi, I Just Got A Cavity Filled At The Dentist

Hi, I just got a cavity filled at the dentist office and it all went well. I don't have any pain at all, however the side of my face where they were working is not really moving. I can smile but my lip doesn't match the other side, and I can't wrinkle my nose/flare my nostril on that side either. Is this normal? Or did the doctor accidentally hit one of my facial nerves?