@missholly
First, please take a deep breath and read on. Nodules and cavities after a bout of pneumonia are more likely than not from the infection.

No cause for alarm, but can this be right "I have an appt with a pulminary dr. on March 6th" -as in March 2025? Cavities, nodules and possible pneumonia shouldn't wait more than 7 months for a second look. I suggest an immediate call or trip to your primary doc to push for an earlier appointment to get an answer on this.

Unusual lung changes after pneumonia can last for months, even longer. The appearance of cavities and nodules together are usually "CT scan says suggestive of multifocal pneumonia..." This means it is possible the treatment for RSV did not fully cure the pneumonia or whatever bacteria is in your lungs - just knocked it down. And since November, is has been busy "setting up residence" deep in your lungs - in the dark, warm mucus down there.

The radiologist saying "cannot rule out malignancy" is their way of saying further diagnosis is needed. It is not meant to alarm your.

Have you been in touch with your primary provider since the ER visit? Have they seen the CT scan and report?

Please let me know what you find out.