I have had loose stool for 3 years have had colonoscopy, barium study and no answers, there is blood in it, about 2 times a week. i go about 6 x a day?

Need to see doc: You need to see your gastroenterologist to do again lower endoscopy and look for the cause or some special xrays will detect the source of bleeding.

See a GI specialist: You can try a gluten free diet. Barium studies and colonoscopy are not sensitive or specific when the symptoms are loose stools. If you go to a gastroenterologist, they will most likely start with dietary modification, like a gluten free diet. This is associated with less risk than continuing with invasive procedures.