While it is rare to have bilateral TN there are lots of us out there. In my experience, it isn't as tightly linked to MS as a lot of Drs continue to believe. Only 5% of people with TN also have MS. I have had two MRI/MRAs clear so far. It is always in the back of my mind.
I'm sorry that you also suffer from both. I have been dealing with TN for two years. A few months ago I started experiencing symptoms in the top branch. I have had three very distinct flare ups or episodes that have many symptoms of migraines. I am seeing my neurologist next week to discuss this and am very curious about what he will have to say.