I've had flu twice in my life and could not get out of bed The symptoms were more in my joints and muscles than cold related Pain killers - what ever you usually take - and plenty of fluids and bed rest. If you have any underlying conditions then be sure to call a dr if you get worse. Good luck stay warm and get well soon
From your previous post I think you had the winter vomiting bug (as did I and partner). Once the the S&D subsides then fever and aching joints followed for both of us for the next two days at least. I reckon this is what you're feeling.
it takes about a week to recover from the norovirus once the vomitting and diarrhoea ceases, you will feel tired, achey and rundown. plenty of rest and light food.