Dear these signs are mostly due to viral diarrhea or any thing which irritates the intestine extremly , like foreing body . But in this case its a viral diarrhoe. The group of symptoms u explained is due to consequences of dehydration n all essential electrolyte loss like sodium pottasium etc..these all maintains the fluid level and blood pressure in our body n blood vessels and cellular integrity....because of same reason she is suffering from swelling and muscle cramps etc.....so please rehydrate ur daughter with ORS immediately as this will also maintain proper level of electrolyte in blood ...and resolve breathing problem...Last but not the lleast consult imediately ur physcian to start proper antibiotics and multivitamins n proper amount of ORS.....till then start eating curd with a pinch of black peeper added. Avoid spicy n bulky fatty meals for a weak.. chew 1 cardamom in every 3 hours or when she feel nauseating