Looking for clarification IBS or IBD.

Hello doctors, I am facing digestive issues from last 7 years. I always have to go toilet 3-4 times. I face this issue only from morning to afternoon. From afternoon I don't feel any evacuation. I feel heaviness  and mild abdominal pain. I have done upper endoscopy the impression was 'H Pylori antral gastritis' also Persistent Dyspepsia. I took 14days antibiotic course and retested it came out negative. This January I also had CT Abdomen and Pelvis the impression was 'Norma Study'. No acute/ Significant abnormality detected. I had LFT, Sool Test also which is normal. Only CRP blood test was showing 19mg/l. I also had fistula operation on last year. I want to know whether my symptoms are IBS Or IBD. Should I go for colonoscopy to rule out IBD? Kindly help.