Why is half of my face immobile?

I noticed around 2 days ago that the right side of my face, including my cheek, mouth, and lip, are feeling weird. I'm pretty sure it's not nerve damage cause if it was, I shouldn't be able to feel it when I poke it and it wouldn't hurt if I pinched it right? I am a 15 year old male. My smile is crooked and basically the right side of my lips won't move. It feels like the problem is originating from my cheek which is affecting the way I eat, blink, smile, etc. I think it's a muscle problem. It looks as if I just got back from the dentist and the right side of my face is still numb but I can feel all pain that happens still. The only thing I can remember before that is I bumped the top of my head against a table but that shouldn't have done any nerve damage right? Also, would acupuncture fix this or should I visit my pediatrician? Thanks! :]