I would definitely recommend getting a second opinion. It is a good idea in many circumstances and i think it would be a very good idea in your case. I do know a woman who was diagnosed with TN that did go away (but I lost track of her and don't know if that was the end of it). It can happen, I guess. Or it could be that she was misdiagnosed. I think most of the time there can be times of remission, but it usually comes back, and I never read about age being a factor. So I would suggest you stay positive and hope she is right, but get another opinion and see which doctor seems the most helpful and knowledgeable. I hope it goes well for you!