I just finished my ten days of amoxicilin of 2,000 mg. Daily. .... I am experiencing still phlegm in the lungs which make me cough & now I have a mild sore throat. I have a medical history of Chronic Bronchitis, Pneumonias and Walking Pneumonias. ...

Hello Anon
Thank you for writing.
Your antibiotic (unlike azithromycin, for example) stops working within a day of taking it so it's no longer in your system. See what happens in the next few days and if your lungs aren't clearing up you'll need to see your doctor again.
Gargle with salt water (uncomfortable but very effective) to help with your throat.
Best,
Ssuan