Dd 10 started with what appears to be a gastric bug on Friday with vomiting and diarrhoea . She has had a high fever too. Temperature better now at 37. 8 but diarrhoea has not stopped. It’s frothy yellow and she has been 3 times already today. I’m offering lots of fluid and she has had one diarolyte today too. She is so weak now. She has a piece of toast today and couple of slices of banana. I have called school and they have another child with similar symptoms so I think I can be confident that it’s viral. Should I be doing anything else?