It sounds really hard. I am not sure what advice to give which you already don’t know… My DD just came down with a bold (we think) as well, 103.5 F, cough and a sore throat. But of a blocked nose. Her siblings has this last week, PCR showed no Covid.
I usually don’t give calpol unless the temperature is above 101/102. I find that having a bit of a temperature makes them rest more and I do believe that it is the body’s way to get rid of illness. Above 102 I give Calpol and when it is up around 104F I alternate Calpol and Neurofen. DD has got fever convulsions in the past when the temperature reached 104.5 quickly and I am keen to avoid that.
Apart from that… lots of fluids. I went to get Coca Cola and Fanta this morning (usually I don’t allow that). Any fruit I can get into her. I have bought satsumas and strawberries. Yoghurt usually works as well. And chicken soup. I believe in maximum amount of fluids and as much vitamins I can get down.
Other than Calpol/Neurofen, I don’t give any medication apart from strepsils. (Diflam spray on the advice of a doctor once and obviously any antibiotics etc as advices by GP).
For sleeping, I usually sleep with her as it is easier to prop her up on pillows (eases the blocked nose) and keep her there during the night.
I was once recommended some vicks rub (I think) to make breathing easier during a cold. You might want to look at that?
Sending you lots of positive thoughts. It will be ok. I am home with DD today so do ask if there is anything. As I said, I don’t think there is anything you don’t already know though 