I've had right sided pain on and off for 6 years doctors have said ibs but i've never had a colonoscopy, doctor said if cancer i would know by now?

Diagnose w/exclusion: Irritable bowel syndrome (ibs) is a condition associated w/ abdominal discomfort, altered stool pattern, & among others accompanying nausea, bloating, gassiness. Often improved by stooling, ibs is defined by changes in perception of gut distension, motility, sensation. Diet & emotional stress play significant roles here in such patients. Need to rule out first inflammation, ischemia, & infection.