my 6yr old hasnt had anything to eat for 4 days now he only drinks water but very little, he ahd a glass of apple juice today...but he wont eat anything..we ask him and he says he's scared of food to ger stuck in his teeth, he lost about 7lbs already since the last time we weighed him,he was such a heavy eater, i am so worried he might get sick, he had jello yesterday and thats it. and nothing today but a glass of aj, should i be worried or is it normal for his age?