Symptoms -blood on toilet paper (not in stool) , slight cramp on upper left side, mucous stools, heartburn. no nausea or any other symptoms. thought?

See GI specialist: This could be hemorrhoids , or a other problem at the anal verge. Mucous stools could be some sort of irritable bowel disease, and the other symptoms are more consistent with GERD or excess acid. Basically , there is not one condition that explains all of this , but fortunately there is one specialists who manages all of this... a Gastroenterologist) . Consider this follow up if needed.