Having really painful sharp pain around my belly button 20 days after umbilical hernia surgery. Is that normal?

I feel like something is wrong. I didn't have any of these pains before today during healing...I bent over this morning and felt like I was being stabbed with a knife right above my belly button. Then throughout the entire day they just randomly come. I reached to scratch my leg or put my seatbelt on or just standing doing nothing...it seems strange. Should I be worried? My hernia was really tiny and only took a stich to repair. I don't feel like I should be having pain like this at this point.