equus - you are just one knowledge hungry little person! could be like minne said that its a physical manifestation of something else going on. with his background it's hard to say without being an expert.
minnie - thanks for the insight from your counselor - i tend to clench my teeth also and the analogy about possibly being unable to talk about what was in your head. wow what a revelation - sounds like me to a tee! thanks for sharing!
cup - i know the "mommy" feeling and i don't like it but probably perpetuated it to some extent.