You could have irritated something.  Is there still something in the gum?  I thought they removed the tooth entirely (shows you how much I know about tooth issues).  My brother has had a bad case of TMJ for years and years, and has more tooth problems than I do.
they did remove the entire tooth.  I'm leaning towards the idea that I aggravated a nerve of some kind. 
I was at work a couple days ago, and yawned REALLY big... and everyone near me actually HEARD the pop come from the right side of my jaw.  That hurt like hell, and I had to go to the break-room to get my jaw comfortable again.   

  TMJ issues... ugh! All because I wanted that jaw surgery.  
 
 