Hi - I was also diagnosed with Atypical Trigeminal Neuralgia and was at the point of begging my neuro for just one day of relief from the pain.
He perscribed Lyrica and it is a godsend for me!! The side effects are annoying such as feeling loopy, and unable to concentrate - but the the relief from the ATN pain in my face is worth it! Not sure if this will help - but I've read that they are just beginning to use Lyrica for ATN, so maybe it's an option you haven't tried. I hope you too can find some relief.. it's truly a debilitating disease! Best to you, Barbara.