What kind of doctor do I need to contact for facial muscle damage?

I'll try to provide pictures soon. I had a rock thrown in my face, recovered relatively well, little scarring. My face has symmetry at rest and with most expressions now, unfortunately, I think I either have nerve damage or damage to the muscle. Obviously I'm not a doctor, but I believe my depressor anguli oris has been detatched from my jaw. When I frown, there is a depressed spot where my DAO is (left side) or should be, however it's like the muscle still works, but part of it has been torn.