blood stools at 16!

Hi, i'm 16 and having blood in my stools. I go to the bathroom 3-7 times a day, sometimes mucus on the stool, and a little bit of constapation and diarrhea. It's been a week and a half and it's only happen twice. Is it possible to be serious at my age such as cancer? Or serious in that matter?

Im 16 years old to .. and ive been seeing blood to .. and on the toilet paper.. im pretty sure my dad has this problem but his okay?... i unno how long should the bleeding last?
im feeling fine, im not sick or anything. i unno what should i do.

When a young person has tummy pain and bloody stools they should ask their Doctor about "Meckel's diverticulum."
From what my son's Doctor said, it happens from birth: after the baby is born, the umbilical cord is supposed to dissolve and turn into the same matter as the rest of the intestine, but it doesn't- instead it turns into a kind-of second stomach (only really small) with digestive acids. After a while these acids burn a hole in the softer, real intestine just below it and you have pain and blood.
My son, who was 19 at the time, lost so much blood while they were trying to find the cause that he almost bled to death. After a few pints of blood, they had to send him to another hospital to use the machine that can see it. The people who were watching the special dye go through his digestive tract yelled, "holy ****!" when they watched the "second stomach" light up after the intestines.
They simply cut it, and the damaged part of the intestine, out (about 9 inches).