Thanks for the question.Though your symptoms are not suggestive of colonic cancer, you can repeat colonoscopy
with consultation of your doctor.Your symptoms are more suggestive of constipation
.Along with food you can start having high fiber containing foods (wheat/oat, methyl cellulose) . Oral laxatives/suppository ,enemas and stool softeners can be tried.Maintain good hydration and regular bowel habit. Reduced intake of non-vegetarian diet.Thank you.