Avoid wheat gluten, Rye gluten , cow dairy products, and all negative fats .. with IBS it is all about what not to do ! oh yeah and avoid anything synthetic unless it is a last resort.
Hello and hope you are doing well.
There could be many causes for the pain you are experiencing. If the pain starts at the back and goes down to the front of the abdomen, it could most probably be a renal colic. This happens when urine is trying to pass through an obstruction usually a stone. But this pain is very severe and colicky. The other causes for the pain could be infections of the bowel and bladder, prolapsed intervertebral disc or inflammatory diseases of the colon. Please consult your primary care physician who will do blood tests, x- rays and may ask for an ultrasonogram to find out the cause for the pain.
In the meantime take OTC Naproxen for pain relief and plenty of oral fluids.
Hope this helped and do keep us posted.