When i lay on my back and raise my shoulders off the floor, i get a bulge in the middle of my midsection, that runs perpendicular to my body. it rais?

Ventral hernia?: It sounds like ventral hernia. It happens when the middle wall of abdomen becomes weakness, separating of the underneath tendon, increasing of intraabdominal pressure push out the intestine. If it does not cause pain, it should be fine.

Exam required: Sounds like a hernia or maybe diastasis recti. Your doctor can diagnose after an exam, and guide your management. It may or may not require intervention, your dr will discuss options with you.

Diastasis recti: What i think you are describing is a separation between the rectus abdominis muscles caused by a weakening of the facial layer between them. It is caused by the forces of pregnancy as well as extreme weight gain in obesity. It is known medically as diastasis recti and is repaired during abdominoplasty surgery. It runs parallel to the long axis of your body.