My Primary Found An Umbilical Hernia After I Complained Of

My primary found an umbilical hernia after I complained of pain by my c section scar. Seeing a Gastro Aug 2. When I over do cardio the scar hurts and swells up. I was try to lay low this week with the gym but I had to paint ceiling s and a room. I guess I over did it, today I am VERY uncomfortable. My question is : can s hernia burst? Should I go to the hospital of the pain gets to a certain lwvwl?