Hi, I am 15 years old, 5'4', 150lbs, I am a vegetarian and i am also bulimic. When i lay down on the floor, my ribs and abdominal area hurts and feels as if its bruised (although its not). Also on my left shoulder blade I have a sharp, pinching feeling. I feel the pinching on my shoulder blade when i reach up to grab something high too. I have no idea whats wrong with me.