I recently went to a pulmonologist and was diagnosed with pneumonia. I was put on coamoxiclav antibiotics for a week and duavent for nebulizing. But it's been two weeks since my follow-up visit, and I'm still coughing up phlegm. The doctor has now prescribed me levofloxacin and zykast. I'm a bit worried since I'm breastfeeding. Should I be concerned about these medications? Also, why hasn't my cough improved?