Earlier this mouth I had my 4 wisdom teeth removed. Everthing went well. I went to follow ups with the Dr. A couple of days ago, I was eating and experienced a pop in my mouth.I couldnt open my mouth wide so I went directly to the DR. The Dr said it looked like I was having a Muscle spasm. However, now I am getting concerned. There is a knot under my jaw and it is very painful. How long should i be in pain? What do I need to do to have this pain go way?