I had IBS for many years. Doctors kept saying eat more fiber, nope, didn't touch it. In Jan 2015, I developed a severe case of constant lower right abdominal pain, with CT-Scan and MRI multiple times. 6 months later, a wrong interpretation by radiologist on a CT Scan thought it was a mass in my ovary. Ovaries came out, nope, nice and healthy and still in pain. OBGYN then finally suggested that I go gluten-free sharing her own personal story about how she was bedbound for 3 months with horrible abdominal pain, constipation and severe diarrhea. She did her research and went gluten-free. Her problem went away, and her severe acid reflux also disappeared.
I went gluten-free, 7 days later my IBS said goodbye for good. It took 6 whole months for that abdominal pain to go away, doctor suggested that it took that long for the intestines to heal.