When i had the flu it lasted a whole week, then after it was over 2 months later i actually got it again but a different type, and yes you can still have fever. my meds cost 1400 dollars but they worked.
Do you feel warm? Are you tired? If so, then you might have a fever. Use a thermometer and check. if it's over 100, then you are sick. Stay in bed, drink fluids, and try to eat and take medicine. Contact your local doctor.