Ongoing cough

Kiana

Hi! So my 23 month old has had a cough for about a month or maybe a little over and I’m at the point where I am worried, is anyone else experiencing this or has with their child? We seen his pediatrician, and Friday he has an appointment for chest X-rays to rule out an pneumonia. I’ve been giving him zarbees cough syrup for cold and mucus, but no progress😕