I have similar problems, I wish I could give you a answer, my doctor says I have ATypical TN because my eye pain is constant, I have been to the emergency 3 times at least because I can't handle the pain, it is with me 24 hours a day and behind my left eye, I live in the uk and have just had an MRI to rule out anything else, I am waiting for the results but the wait to see the neurologist is going to be a few more weeks, fortunately here we have the nhs, unfortunately it means we have long waits which is not helpful especially when trying different treatments if one isn't working.