I have had atypical trigeminal neuraligia since 2002. It started abruptly after surgery to remove my thyroid. After six months of increasing pain I wanted to die. Klonopin saved my life. I started taking 3mg a day and now only need 1.5 mg per day to keep the pain under the threshold. The top two branches of the nerve were affected for me- so my chronic pain is in my forehead, eyebrows, cheeks, bridge of nose, and front teeth. It's a mystery and I hate it but fortunately I found a treatment. See if your doc will prescribe you a trial dosage.
Have you been to the dentist? I was diagnosed with Trigeminal Neuralgia and then told to go to the dentist just to be sure there weren't any issues. I made an appointment, but my dentist was out of town, so the "substitute" dentist saw me. She did x-rays and removed a white filling that I had, mentioning that some peope have a bad reaction to it. The x-rays were not very good, she had poor quality film and they turned out very dark. In the mean time I was put on medication for the trigeminal neuralgia and my pain subsided. When I went back to my dentist, pain free, he saw that I needed a root canal. I was on the medication for 6 months, the amount of time before I was to go in for a follow up, and I had the root canal done. So after all this, I am pain free, but don't know if it was the medication that relieved it and I was one of the lucky ones to have the neuralgia subside due to heavy medication or if it was the root canal.
Hope this gives you an idea......