I'm going insane here. I have this eye-twitch thing that has started happening this week, and it just hasn't let up. Every few hours, every day--sometimes for an hour at a time--my left eyelid does this awful twitch back and forth, using what I presume to be one of the muscles that I use when I blink (it feels sorta the same). It seems to happen more when I get upset or stressed. It's annoying, sure. I can't just let it go, it feels like there's a worm in there or something and I can see my eyelashes moving, so I have to close my eye or put my finger on the lid as long as it goes. But more than just the annoyance, I'm worred. Am I getting Tourette's or Parkinson's? Am I losing voluntary facial muscle control?! I'm only 20!