Hi well come to HCM.
Headache and backach are usually associated with most of fever
.Only four days are
gone and it being low grade you can wait for another 2 to 3 days and continue to
take paractamol as when needed at the interval of 6 to 8 hrs. If viral it should go
on its own, as it is self limiting condition. If does not subside consult your Doctor
and if suggested by your doctor get done lab reports. Thanks