First of all, try not to worry- I know this is easier said than done, but it wont actually help you!
I'm sure that the first priority is to get the pneumonia cleared up & I'm sure you are in good hands at hospital & receiving the right treatment for this to happen.
By all means ask to see the CT scan- & ask if someone can explain it to you- a 2nd opinion may help. As the pneumonia is so wide spread this is probably why there is so much scar tissue?
Meanwhile rest while you can to give the medications every chance to work. Please let us know how you get on & take it easy! I wish I could help more!