*******Pneumonia symptoms

Hi so I went to the emergency room on Sunday March 29 because I was shortness of breath mild cough mild headache mild sneezing every thing stop except the shortness of breath ok so the doc said it was pneumonia n prescribed me some antibiotics azithromycin pills 5 day supply to clear it up my question is has any ever had this n was proscribed this med if so did it help n will Monday the 6 of April be to early to see if it’s clear when I go get X-ray