Two out of my three kids have had pneumonia.
In fact my youngest son had it a few differnent times and was sent to Boston for a scope of his lungs as they found a "shadow" on his lung after a review of all of his xrays. That turnd out to be scarring from his worst bout and nothing to be concerned about.
Very scary times though, so I know what you are going through.
Thoughts are with you...try not to worry too much, a parent can invent horrific things in their minds at times like this. Easy to say though...I realise.