I'm scared why does my belly button hurt?!?

its not like it hurts that bad, but i was peeing and i moved a certain way and i felt like not a real sharp pain, but enough to know it was there. i googled it and stuff and now i'm all scared. could it be from doing a lot of pilates? i do a lot of ab work, could i just be sore? or is it something more serious? i read about hernias, but i'm really not having any other symptoms except for the pain. i'm 14 years old.