I fortunately have never had pneumonia. I work in healthcare, though, and I don't think it would be out line to ask for a sputum culture to ensure your antibiotic is going to kill what is causing your pneumonia.
Hope you feel lots better soon! Drink lots of fluids. Have you tried Mucinex? I use it when I have sinus infections and I think it would help move that junk out of your lungs faster, too. But I'm not an MD! Maybe ask if there is something else that can help your symptoms.