Suggest Treatment For IBS, Colitis And Ileitis

I have gas, cramps, very loose stools, diareahe, switching to constipation for years - Have been diagnosed with IBS, colitis, iliitis and many other digestive diseases. Tried all medications over the years with no relief. This comes and goes. Jus heard about ileocecal Valve Syndrome and wondered if this could be my problem and how it can be treated.