White Tissues like thing?

Rebekah • Hey I'm Rebekah, my son Elijah Wade Ukariwe was born on December 28, 2015 at 1:25am 💙. Weighing 6pounds 10oz.
So I went to the bathroom and I got up to get more toilet paper.. When I turned around to see if there was some behind the toilet .. I notice a white small tissue like thing in my pee? Could it be just discharge cause I'm worried... Should I call my OB? Idk what to do!