5 days after colonoscopy, wondering if with no fever or bleeding, and normal bm, but with nagging abdominal discomfort, is a doctor visit prudent ?

Yes sir: this is probably nothing however you will not know unless you get your physician to say that after checking you out. I don't like to miss diagnoses do I would work that up depending on my exam findings. this could possibly be due to a complication of the colonoscopy itself. I am uncertain at age 42 why you had this procedure and that is a very important piece of information. go see ur doc