Thank you for your query.
Well you are having FLU
thats a viral infection . Well in flu you can have this type of vague feelings , bodyaches etc. and extreme weakness . You can take paracetamol
for bodyaches and fever
and a multivitamin
tablet that will relieve your symptoms .
Generally it will subside on its own without treatment.
Hope you are satisfied with the answer.
If you have any further queries feel free to ask.
Wish you good health.