Mike: IBS is a "functional" GI illness, meaning that the structure and overall gut health is in order. The two most common issues are disturbed gut flora (often from too much antibiotic treatment in childhood) and history of stress/trauma, which given your physical issues, seems reasonable to assume. In addition to seeing a natural MD for guidance in enhancing your gut microbiome, I suggest clinical hypnosis, which is demonstrated in research to be HIGHLY effective in curing IBS. https://www.med.unc.edu/ibs/files/educational-gi-handouts/IBS%20and%20Hypnosis.pdf
Carol B. Low