DD 11 came back from school shivering Wednesday, she also had a headache and by the evening she was achey all over. Next day she was the same, slept most of the day, on and off nausea. It’s now Sunday night and she’s still the same only addition is a wet chesty cough which started yesterday and is now constant. Her temp is coming down with Calpol and calprofen but I’ve been giving it to her every 4 hours throughout the day since Wednesday. I’ve done 2 covid tests spread apart and they’re both negative, she has no sore throat or earache. Feels like a sort of flu to me but I’m starting to get worried about this temp. Anyone know of any illnesses like this going around right now? It’s hands down the worst shes ever felt with an illness.