I've been having sharp abdominal pain on and off for the past three months. It's like there's a vertical tear in the middle of my abdomen slightly off-center to the right. I get this pain when I've been sitting for prolonged periods of time (working as a computer programmer, this is an everyday occurrence, but the pain isn't). I've gotten bloodwork, an ultrasound, and a barium enema, but they've all come up negative. As was stated in the title, there's no bulge, so it's likely not a hernia, but I have no idea what else it could be, as the abdominal pain is the only symptom I have.