DD2 has had a slight fever all day, got worse in the evening (up to 38.3 despite Calpol). She was grumpy all day and slept a lot, refused most food and even her evening milk. No other symptoms as far as I can tell though... what could this be? Does she need to see a doctor? DD1 always has a very obvious cough or snotty nose to go with it so not used to random fevers!