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.
