How long would you leave it before getting worried. Ds2 (4) and dd(2) have both had d&v more v than d for a few days now and neither of them are keeping much down. I'm not even sure if the waters staying down now. I know ds hasn't weed at all today. DDs nappy is pretty dry. They both have slightly raised temps but paracetemol won't stay down either. When should I start getting worried and what should I do?