what does your doctor say? did he give you any answers maybe ask the pharmacist. he may suggest something over the counter. are you drinking plenty of water? if the medicines you are taking make your throat dry you will need water to replenish what you are losing from the pneumonia. i have had walking pneumonia plenty of times and my doctor put me on amoxicillin and told me to drink plenty of water. if your cough is bringing up stuff from your lungs that's a good thing but if it's dry you need water.
had pneumonia now stuck with a dry and productive cough for two months. 2 chest x-ray showed pneumonia first rml pneumonia then the second x-ray lll pneumonia. now i have this cough that sometimes is dry other times productive going on now for two months.