My nearly 3 year old dd has been sick on 2 car journeys over the weekend. She has a bit of a chesty cough and I'm thinking that the accumulated phlegm combined with the car's movement has caused her to be sick. She is fine in herself, no temp, eating & drinking fine, normal nappies and running around chatty as ever. Should I keep her off nursery tomorrow in case it is a bug or not? Please help me decide. I don't want to make anyone ill if it is a bug.