Welcome to HCM,
As you have finished Z-pack course, continue with Mucinex
for few days more.
Mucinex contains Gueaniefen which will help cough
With Mucinex you will good expectoration and will help to bring more cough out.
As you are having more phelgm, take Z-pack for 2 days more.
Avoid fried, cold
drinks and junk food.
Ok and bye.