I was sitting at work and I got this horrible pain under my right ear. A little on the jaw bone. The pain was so bad that I felt like I just got punch on the side of my face. Since then, I've had swelling under my ear and behind the jaw bone. It even hurts to touch the area. Is this a ear infection? And should I go see a doctor?

Yes you do need to see a doctor.

Has anything happened in that area at all? Your best bet is to see the doctor.