Hi there @picea_r and welcome to Living With Facial Pain! I am always glad to meet relatives here, your mother is surely lucky to have you by her side. How is your mother doing now? I feel so bad about how she is feeling and I hope that she feels better soon. I made a quick search about Trigeminal Neuralgia and found these 2 threads; Work-up for TN and Unraveling Trigeminal Neuralgia, interesting read. Both of these discussion threads seem to be kind of old, but still, maybe you’d be interested to read it and maybe something in there could help.
If there’s a specific topic you are looking for just click the search icon (top right), it is a big help! If you have any questions, please feel free to message me. Just click my avatar (the circle with an “E”) and from there, you can message me! The “New User Help” below the big banner is a great place to start with when familiarizing the site. 
Eymie