IBS is hard to diagnose and they do other tests to rule out ulcers, etc., first. Anything you can do to reduce your stress level helps with IBS. Certain foods will cause a flareup. You have to keep a diary as to which feeds bother you. I personally could tell no difference with the FODMAP diet. I have the IBS-C and take Linzess every night 72mcg for it. Drink lots of water, dairy bothers me, especially milkshakes. Even though doctors want you to increase fiber, I can't tolerate a lot of fiber such as fibercon. Miralax was hit or miss in that you have to play with the dosage so much to get the right one. Cereals that are high in fiber help me most. Oatmeal helps greatly. I have been on Bentyl (prescription) for pain, but I am no longer having to take that since my gut has calmed down. A lot of people take Levsin (prescription) but although it worked, it caused blurred vision and I had to stop taking it. Anything that helps you to relax...helps your gut. A good probiotic. I hope this helps. IBS is very tiring and painful. Sometimes you can go from diarrhea to constipation with it and vice versa for no reason. It's a process. God Bless You!