My dd is 4 years old and has just had chickenpox, this last week she's been complaining of stomach pains and headaches so went to see the doctor but she couldnt find anything wrong so took a urine sample (still waiting for results) - I have just noticed that the back half of her tongue has a white coating - her breath smells but she says her mouth doesnt hurt at all. Do I phone the out of hours doctor or wait until monday? A google search throws up options such as diabetes, etc - sometimes she seems fine and has more energy than she knows what to do with then suddenly she'll say her tummy or head hurts? Does it sound like oral thrush and can this come just because she's a bit run down after the chicken pox? I'd be really grateful if anyone could offer some advice. Thank you.