Its like the middle also i am have a chubby belly

Where? I'm asking cause if it is near or around your belly button it could be a hernia... but... if you are like me and had some of a chubby belly, it is cause of swelling of the fat stored there... it hurts like a bitch but the doctor said it is harmless and is really common in pregnant women or those who recently gave birth

Maybe a hernia?

Sounds like your growing a baby lol jk hope you feel better soon.