I have a strange stomach pain after I eat. Its been getting worse, and I recently began vomiting. The pain is on both sides of my lower abdominal and my stomach, and radiates to my back, causing spasms. It comes in goes in waves for about a hour. Nothing seems to relieve it. Moving makes it worse, as does laying on my side. Whats wrong with me? (I've had my gallbladder removed so I know its not gallstones)