Umbilical Hernia question????

OKAY SO WHEN I WAS PREGNANT WITH MY SECOND CHILD I GOT AN UMBILICAL HERNIA......THE DOCTOR SAID IT MIGHT GO AWAY ON ITS OWN OR I MIGHT HAVE TO HAVE IT STITCHED UP, SO MY QUESTION IS HAS ANYONE ELSE HAD ONE AND DID IT GO AWAY ON ITS OWN? AND IF IT DID HOW LONG DID IT TAKE??? GIVE ME SOME INFO PLEASE!!!