Could my outie navel be a hernia? (Photo)

I’m a 23 year old woman and as a child i had my umbilical hernia fixed but was still left with a pretty noticable outie. It didn’t protrude past my stomach but lately it pops out when I flex my abs a certain way. When I do so, my navel protrudes about 1/1,5 cm. When i cough or sneeze nothing seems to happen to it. Could it still be a hernia?