ugh. So frustrating, isn't it!? While I am quite aggrevated with my latest flare-up, my advice to you, hdigi, is to immediately stop the high-fiber consumption! No granola or high fiber cereals, whole wheat bread, raw veggies, fiber pills, etc! While oatmeal is considered a water-soluble fiber, eating oatmeal for breakfast just sends me to the bathroom for hours. Eliminate citris fruits, and cut down on milk products, and no yogurt....and no probiotics either. And do you take fish oil pills? If you do, stop. (I've switched to Flaxseed oil, but not sure if that is working either) Take a few days and just do the white toast, rice and chicken broth/soup diet so your gut has some time to settle. Lots of folks on here swear my Imodium. Try that as well.
I don't have the link anymore, but I found a site that had a great list of foods for the IBS sufferer to use- with water soluble fiber. Maybe if you google it you can find it.