Thank you for the query.
If no discharge from the belly button, most likely you do suffer from umbilical hernia
. The main problem with such hernia is that the hole in the abdominal wall is usually small so the intestine can stuck in it what usually leads to bowels obstruction or intestines necrosis
. And you never know when will it happen.
So if it gives you pain I suggest you to get scheduled for surgery and do not wait anymore.
Hope this will help.