Hi, I Just Finished The Z-pac 6 Pills 250 Mil,

hi, I just finished the z-pac 6 pills 250 mil, 5 day treatment, im still coughing with clear flem, started to take mucinex to clear up not working yet, how long does it take, had follow-up with doctor says lungs sound good, sweating, fever, chills are gone, still feel weak, tired 66 years old. thanks any sugestions? steve