Hi there
I no exactly what you are going through, our family 2 DS have been through a terrible time, they had really high temps for 4 days and the only thing i could do was give them panadol, i talked to the chemest and they told me not to use nurofen because it is absorbed in the stomach and with what they had ( tummy cramps) they said that was not advised. I no its scary. my boys where very lethargic and wanted to sleep all the time, my oldest didnt eat for days just didnt feel like it. I am not sure if this is what your dd has but i just wanted to share my story incase it is and to let you know.
hope she gets better soon