Thank you for your question.
I am Dr. Su S. and I will try my best to help you.
I think your doctor is following the right course.
You have taken a good course of antibiotic.
You can try mucolytic now.
After an infection, you can feel tired, weak.
Please take rest, have more fluid.
However, if you feel increasing cough, fever or chest pain again, I would advise to take a review by doctor.
I hope this information will be helpful.
If you have any query, please feel free to ask.
If you are happy with my answer please click on the Excellent/Good rating.
Wish your healthy life.