question: my son who is 4 and about 38lbs. has been complaining of a stomach ache right around his navel and has thrown up several times( all liquid looking vomit). He has complained some about a headache and at one point it felt as though he had a slight fever though has been hard to tell his whole body has felt hot most of the day. When I gave him a bath to try and help him feel better he got out of the tub with teeth chattering and his whole body shaking like he was freezing but he felt warm to the touch! What is wrong with him. I have given him fever reducer.