I've a red color in my stool every week (once a week). It is just a small part red in color in my stool. I never had this kind of problem before. The first time having it was two weeks ago, diarrhea, and my stool has some part of bright red in color. After a week later, it happen again and another week later, once again. So, i am a bit worry of my health. Is this mean there is a blood bleeding in rectum??