I've got Crohn's so I totally feel for you. Middle of the summer all I could eat was white food (carbs like potatoes, pasta, bread and cheese) because I was in so much pain. Don't give up yet, and keep up on your doc because it was when I finally got assertive and told him that something needed to change that things got better for me. Sometimes what I found was good for the back pain was eating earlier in the day (nothing after four, for some reason) and using a heat pad on my back. Good luck!