I have braces now. No more clenching. It must have been due to a bad bite.
No one has ever figured out the sensitivity though. I get the "You might need some root canals... uh, no. No root canal. Hmm." That's it.
Accidentally punching the hygienist will make you feel better. I'm just saying. It worked for me. That, and I take Advil prior to every appointment.