In addition, if the doctor heard abnormal sounds
(rales or crackles) when he/she listened to your lungs
, antibiotic treatment for pneumonia would be appropriate, despite the X-ray interpretation being “within normal range.”
If you are raising phlegm, submitting a specimen of it to the lab for bacterial culture could be helpful. And, if you continue to have fever especially fever while being treated with an antibiotic, culture of your blood might also provide good information.