Sounds like a hernia. I have one right behind my belly button that the doctor found. It feels and sounds like exactly what you described. I had no idea I had it until the doctor started poking around on my stomach.
Idk either but to be honest with you I hope its gas to lol. Ima talk to my doc tomorrow it just freaked me out bc I'm having tightness in my stomach then I felt that. Thanx ladies!
Never heard of it, but consult with your doctor immediately to be on the safe side.
Is your appendix still in? I'd tell your doctor for sure. Hope it's just something simple like gas (not that I wish flatulence on anybody, but it's better than something more severe, lol). Hope you feel better soon!