Why does my stomach hurt and make noises when I eat ceral or drink milkshakes?

Lactose intolerance? Could be related to an intolerance of the sugars or proteins in milk. Does this happen with other milk products? Try cutting out the milk or using lactase from the grocery store or pharmacy.
Food intolerance?? If you feel uncomfortable soon after you ingest any particular food your body is trying to tell you something. It is saying do not put this stuff in me! Maybe it is spoiled; maybe you have developed an intolerance to some ingredient in the food. Listen to your body.