abnormal cells & swollen lymph nodes, not due to prostate cancer?

My husband just had a pet scan to determine what the abnormal cells and 4 swollen lymph nodes are in his lungs. We met with the doctor and were told that a finger biopsy would have to be done on the lymph nodes to determine exactly what's going on,, which will be done next week.
He said that it did not seem that the tumors were consistent with the spread of prostate cancer. I'm fearful that means there is another site.
He did call the abnormal cells tumors but also said that perhaps these were indications of the body fighting off infection. I hope and pray that's it.
So now we wait until next week. Last night I had a total meltdown and cried for over an hour (by myself in another room). Felt good to get it out. Didn't realize I had all that bottled up emotion.
Ready to do battle again.