[joy and bella]

This has never happened before, but i just took bella out to poop and when she was doen i picked her u p and felt something on my arm, and IT WAS BLOOD. i lookked at her butt and thats where it was coming from!!!!! why would her butt be bleeding!!??? i am sooo worried i am freaking out. i dont know if this is no big deal or something huge that is really wrong with my baby. could it be bc it had been 11 hours since she had gone out???? someone help me!!! thanks soo much in advance!