Allan I've been relatively lucky compared to you, my appetite is slowly coming back, still exhausted but am out of bed. That honey lemon and spice mix made a huge difference, also made Sage tea with honey, great for soothing a sore throat. Still took paracetamol and Ibuprofen as needed.
When your appetite goes and you get the fever with the flu your salt and sugar levels drop as does your zinc and magnesium. Top them up if you can with supplements or if you can eat something simple like boiled rice with a little soy sauce will help regulate your salt and sugar.

The wind and temperature drop doesn't look good, so as Allan said stay safe and be careful and stay warm.