Re: Blood in stool then no blood??
It was probably a hemorrhoid that bled. If you have suffered pain in the back passage it could have been a tear, but at your age it should clear up on its own as long as you avoid becoming constipated. The tummy pain is probably not related at all and you are putting the two things together unecessarily. But you have done the right thing to make a doctor's appointment. I wouldn't worry too much at your age. Good luck.