In past two months, I've had a range of ****. Some have been cylinderish; others have been ribbon like stool.?

Could this be colon cancer?

Abdominal distension: Nope
Abdominal pain: Nope
Unexplained, persistent nausea or vomiting: Nope
Unexplained weight loss: Nope
Change in frequency or character of stool (bowel movements): nope
Small-caliber (narrow) or ribbon-like stools: I dont' think so?
Sensation of incomplete evacuation after a bowel movement: Nope
Rectal pain: Nope
Age. About 90 percent of people diagnosed with colon cancer are older than 50: I'm 20.
A personal history of colorectal cancer or polyps: Not that I know of.
Inflammatory intestinal conditions: Nope
Inherited disorders that affect the colon: I might have hemmorides, thouh it usually doesn't cause a problem for me. Basiclly it's not active most of the time.
Family history of colon cancer and colon polyps: Only my grandma, nobody else even polyps. My parents who are over 50 both got colonoscapes, neither one of them had any polyps.
Diet. Colon cancer and rectal cancer may be associated with a diet low in fiber and high in fat and calories: Probably
A sedentary lifestyle: Yeah, but do try to get at least a little bit of exercise each day.
Diabetes: Nope
Obesity: I'm only 135 pounds
Smoking. I don't smoke
Alcohol: I don't drink
Growth hormone disorder: I don't think so.
Radiation therapy for cancer: I've never had cancer or anyone in my family except for my granda who was a smoker.