My son has been experiencing stomach cramping for almost five days. It started with what we presumed a flu (headache, diarrhea, cramping). The headache went away after 24 hours but the cramping still occurs sporadically, 2-3 times per day, lasts about 20 minutes then goes away. Not always around meals but he is not eating much as a result. He is still active an not showing any other symptoms. He has loose stools but is not going more frequently than normal (2 times per day).