, sore throat
and cold - all are very likely from a viral infection.
The fever goes first; cold later.
, loss of appetite are all aftereffects and generally disappear in a few days.
If they persist, or if fever comes back, you need investigations.
It looks like post-influenzal asthenia - you will be OK / it is a question of time
Force yourself to eat - after all you need the strength - to bounce back. You will be OK in a few days