My left Rib Cage is sticking out awkwardly as compared to my right rib cage. And my abdominal muscles in the left side also seem to be less distinct and visible as compared to the right abdominal muscles. When I lay down I feel a kind of pull in the lower left side of my abdomen(near the rib cage). And sometimes I feel the need to take long breaths as I dont seem to take in enough oxygen through regular breathing.