DD is 16 months and started to hurl around half four this afternoon. Was only fromage frais and then watery after that so smelt horrid but didn't concern me too much. She's slept until about 11.30 and has been awake since. Can I Calpol her? There was still some dry retching about an hour ago but no more vomit since 6pm is there anything I can do? When do you need to worry about dehydration??