you need to see your medical provider so you can be properly examined to find the source of the blood. bright red blood tends to originate from the anal area or lower rectum so a source can usually be found relatively easily. some possible causes include an anal fissure (a small tear at the anal opening often caused by constipation) hemorrhoids or even polyps. it is very important for you to be examined.
i have had bright red blood in my stool for over a week. i have felt no pain or discomfort since this started.