Hi there Sonia and Panicked,
Have either of you had MRIs or other tests which show a cause for your dx. I have a knot of arteries tied round my Trigeminal Nerve - left side - causing chronic paresthesia, neurological facial pain and TN. A proper dx of the root cause is essential for the treatment of all of these conditions.
Panicked, I would suggest you also Post your whole history on our Dental Forum as this was the trigger. You may find answers there.
Sonia, I do not know about Botox as a treatment, I would feel the same as you as to ending up looking 'plastic'.
I would point both of you in the direction of nasal Lidocaine spray which is known to give instant relief from an attack.
To both of you, suffering this sort of excruciating facial pain is miserable, debilitating and seemingly endless. Know that there are people here who understand your pain and can offer support.

Dave.