How are you measuring your progress?
Ditto on completely eliminating gluten. If you have a hand blender, try making coffee with butter/coconut oil and using that (bulletproof coffee).
My best advice is to take an honest look at what you eat. Maybe a food journal (not calorie counting) just so you're more conscious of your intake.
And minimize stress. I've had a back injury (upper) and understand how frustrating it can be when you feel held back by it. I was 210 lbs when I sprained my back and I'm 175 now (with a shoulder in top of that, blergh).
If you haven't tried minimalist shoes like Merrells or Vibrams, please do. They do so much for proper spinal alignment.
"The grand essentials of happiness are: something to do, something to love and something to hope for." - Allan K. Chalmers (1759-1834)