t recall it starting until I started on medication, but I know clenching in general from anxiety or from anti-depressants can cause
clenching of teeth, which can cause the
jaw pain. I also have the exact same thing with my arms. I have, too, been afraid of it being heart related. Anxiety can do some really crazy things to our bodies. When I am really freaked out sometimes it helps me to read the symptoms of anxiety and it makes me feel better to see that what I am experiencing is normal.