I Was Diagnosed With Acute Pharyngitis And Just Finished My

I was diagnosed with acute pharyngitis and just finished my 10 days of amoxicillin. But my cough is still present, not productive and my chest feels as though I just got out of the pool and swallowed water. I don't have a doctor presently since i hadn't been sick for 4 years! So, I went to a walk-in clinic about 10 days ago. I think it may be something else - maybe even pneumonia. I am an elementary teacher who is exposed to little kids.