Hi.... I have just read through your query. By what you say I feel that your kid might be having a very initial stage of viral watery diarrhoea. Unless the kid is very dull and lethargic or he is having bilious or green vomiting or abdominal distention for high grade fever or decreased urine output or blood in the motion you need not worry. These are the Red flag signs which should make you take the kid to a pediatrician or the nearest Emergency Room. Otherwise you can as of now give over the counter antiemetic medication which is licensed in your country. If he develops diarrhoea then you need to give him oral rehydration solution and zinc supplements. Regards - Dr. Sumanth