Earlier out of no where the left side of my jaw started hurting. Like right where it connects to your ear. But my ear doesn't hurt. It's just the left side of my jaw, it's sore and hurts somewhat.
Any ideas on what's wrong?

The muscles to your jaw tightened up on one side and they aren't working together as they should. You have to free up the muscles to get them both working together to get rid of that pain and here's how to free them up:
Jaw muscles:
Put your fingers on your head so your thumbs are behind your ears. Press into the back of your jaw next to the skull and hold that pressure. After 30 seconds slowly raise your head until your neck is fully extended then open your mouth as far as you can. Release the pressure but hold your head and mouth like that for another 30 seconds.
For best results relax your body first by taking a deep breath and exhaling then remain this relaxed.