Hi and welcome to neuro talk. I know that lots of us with Trigeminal neuralgia have that has a symptom amoung other things,... perhaps you may want to read or post in that forum many of us have been or are on lyrica too. here is the link...
http://neurotalk.psychcentral.com/forum26.html
sorry your are here and in such pain but I know you will find many helpful caring people that want and will help you in any way we can. me being one of them
Welcome to our family and glad you found your way.

PEACE
BMW
or you may want to go to the dentistry forum ...
http://neurotalk.psychcentral.com/forum89.html