First of all, welcome to the forum, although sorry to see you're having an anxious time.
It's difficult to know why you weren't aware you had a TN diagnosis, but you would obviously have had the right treatment plan to deal with it & there's no reason not to be positive.
Do you have a BCN, who could talk you through your diagnosis & treatment plan? If not, then do ring the helpline above to talk things through.
If you have been, google is probably best avoided if you're not clear on things as there is a lot of out of date information & scare stories on there which does not help with the anxiety.