I've had this pain around my belly button since Sunday..I thought it was because I was doing to much…

I've had this pain around my belly button since Sunday..I thought it was because I was doing to much bending. But as the pain continued I decided to go to labor and delivery yesterday. Doctor ran test all came back normal then she checked for a naval hernia, she couldn't find one. Today I'm still felling this same pain. What is this? I feel it many times through out my day it's random and I could just be laying down and still feel it