hello I had a serious skiing accident 18 months ago - major chest trauma - fractured sternum and 3d image showed bone shattered at bottom/back, fractured ribs, detached zyphoid, and chest and stomach detached, left rib cage displaced - lower & more forward than right side . I have been having problems in zyphoid area and under left ribs, and poor balance - cant seem to engage stomach muscles fully. An endoscopy now shows damage to my stomach on left hand side. will I need an operation to repair?