My Name Is Angie, I'm 67 Years Old, 5'5" Tall

My name is Angie, I'm 67 years old, 5'5" tall and weigh 125 lbs. I was diagnosed with triple pneumonia and was hospitalized for 4 days. I have a very dry cough that is getting worse. My doctor wants me to cough up mucus/phlegm, but no matter what I try (steam, lemon, expectorants, etc...) nothing has worked. I need to cough up something soon or I'll be back in the hospital and they'll putting a scope down my throat!
Thank you,
Angie