Lung nodules: Can they ever be non-cancerous?

I had RSV pneumonia in Nov. Recovered well. On Tuesday I went to ER for an ear infection. They did a chest x-ray then decided to do a CT scan. The results have me terrified. I have no SOB, no symptoms what-so-ever. The CT scan says suggestive of multifocal pneumonia, cannot rule out malignancy. What scares me is the irregulary-shaped nodules. Can they ever be non-cancerous? I have an appt with a pulminary dr. on March 6th, but in the meantime, I am driving myself crazy.

There are multiple bilateral irregularly-shaped lung nodules. Several lung nodules demonstrate central cavitary changes. Example nodule within the medial superior segment of the right lower lobe measures 3.1 x 2.6 cm with central cavitation. Additional 4 x 2.6 cm irregularly-shaped nodule is present within the anterior left upper lobe. This lesion is without cavitary changes. No pleural effusions. No pneumothorax. Heart size is normal. No pericardial effusion. There are shotty mediastinal and bilateral hilar lymph nodes, likely reactive. Liver density is decreased. There are bilateral simple appearing renal cysts.

Any input - good or bad - would be appreciated.