Teenage DD got tummy ache while eating her lunch last Friday (she was eating normally until then). Managed to eat a tiny bit during the rest of Friday and Saturday but hasn't eaten since. Hasn't been sick or anything like that but complains about tummy ache which seems to be high up and in the middle. Feels pretty poorly (but then given the amount she's had to eat, that isn't surprising). Is drinking OK. I just got a couple of teaspoons of jelly down her but she refused any more. She doesn't seem to have a temperature. Any thoughts?