My Neck Is Killing Me

Been thinking about the possible causes:

1. The position of my hair parting. I need to tilt my head to keep my hair off my face.
2. Dentistry.
   
3. Dancing for Evocation 2011.
4. My awful posture while studying for exams.
5. My terrible sleep habits and my inability to sleep unless I'm twisted like a pretzel.
6. My super heavy tote bag.
   

To solve this mystery, I'll have to proceed by elimination. So begins my neck diary. This time, I do not kid.