Last Night I Started Having Localized Pain Across My Stomach,

Last night i started having localized pain across my stomach, by my belly button, and a little above and below.It felt, feels, like a pulled muscle, but when i push on my tummy it hurts. In addition a few months ago i noticed that there was a protruding piece of flesh that was going into my bellybutton and figured it was because i am fat right now. (5'8", 214 lbs). well not that hernia looking thing in my belly button feels harder and hurts when i push on it. Could this be muscular or does it sound like something worse? thanks