I am so sorry for what you're going through.
To address this issue of doctors saying you look fine while you know you're not fine, I always recommend that people complete the OSDI questionnaire and take it to the appointment, discuss it with their doctor and request that it be made part of their medical record. Symptom data is very important with ocular surface disease and the real specialists know full well that they do not always correlate well with what they can see through their fancy gizmos.
If even with that you do not feel your doctor is taking your symptoms seriously, then it's time to move on again. I know it's frustrating, but with dry eye persistence is vital and DOES pay off, especially in this area of getting a doc who will really help. If you need a new doctor choose them carefully and if possible get a recommendation from someone here.
The Dry Eye Zone