your ideas seem sound to me. bells palsy is pretty distinctive symptomatically and it doesn't sound like what you are dealing w/ at all. you're doing precisely what you should when uncomfortable w/ a diagnosis; moving onward for more insight. nice move! i hope you check back in after you appt. w/ the neurologist and update w/ what was discovered. that would be helpful to other users for sure.
my best wishes for the rapid dissipation of your symptoms and full recovery!
and try to be mindful of when you are clenching. see if you can channel that pent-up stress elsewhere perhaps? or smile!!