Good luck to you. I've been in my sitch for over a year and a half and for you to last 3 years without much improvement is a testament to your devotion.
If you filing first doesn't change anything, then at least you know you've tried everything you could. Only you can decide when you've had enough.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.