My 2 year old has had a tummy bug and not eaten anything and kept it down for 3 days. She is now refusing to even have a bite of dry cracker or toast. She keeps asking for things then not wanting them (kept a few grapes down until she had half a slice of toast yesterday and it all came back up). All she's having is chamomile and fennel baby tea. Any suggestions as to what she should be able to keep down that doesn't involve any dairy products? Getting a bit worried now as her energy levels are so low and she seems totally disinterested in food