Hi Aliya,
I am only recommending this because of some of he symptoms you described are similar in nature to mine and I recently was surprised by what my doc discovered.
My dry eyes and neuropathy symptoms are viral in nature. Specifically caused by HSV-1 virus for me but for others it can be the caricella virus.
Ask your doc to do a HSV-1 and VZV IGG and IGM antibody test. If they are both elevated especially the IGM then you you might also have viral issues. It sure has done a number on my nerves.
If they are high they can put you on a anti-viral med and it helps. Now I am working on getting my nerves back to normal.
Good luck