Bf has short stabbing pains occasionally right side below bellybutton very short. went away for a week, now back. pebble like poo. 17 yrs old like me?

Possible gas cramps: Sharp pains that come and go are more consistent with gas cramps, whereas persistent pain that increases in severity or associated with vomiting would be more worrisome. Pebble like poo sounds like constipation, which is often associated with cramps. I suggest increasing fiber and fluids in diet with veggies and bran or stool softeners such as Docusate sodium or Citrucel for maintenance.