andyMunich,
NO. It is not even close to a sub-concussive impact. They require 20 Gs or more.
You need help with your anxiety. Your jaw action can be caused by anxiety, stress, medications, or a movement disorder.
L-Theanine can help you relax better. 5-HTP is also helpful.
Amazon has a 5-HTP supplement with L-Theanine, GABA, and L-Tryptophan by
Amazon.com