Welcome to healthcare Magic!
You seem to have viral syndrome
and a post viral tired state.
Viral infections affect the nutritional condition of the body and drain the energy stores and proteins
for it own replication.
You should have rest for a week, make sure you eat a balanced healthy diet and ensure hydration, add multivitamins supplements to your diet to hasten energy stores repletion and restore the normalcy.
I hope the advise would be informative and useful for you.