This may give you some comfort. I had colo rectal surgery surgery 2 years ago and resection about 6 months ago. Things were going great up until about 3 months ago. I began seeing blood, similar to what you describe. Of course, I was greatly concerned and made an appointment with my family doctor. He sent me for a colonoscopy. Thankfully, they didn’t find anything. It turned out to be hemorrhoids. I was told to take Colace and Metamucil for a few days and it worked perfectly. Whenever I see blood now, I do the same thing and it disappears almost overnight. I hope this helps.