If she is having trouble breathing, run a hot water shower and close the door. Just let her stay in there for a while. Make sure that you dry her off as she will be wet from the condensation (steam from the shower). The steam will help break up whatever gunk is in her lungs.

Try that a couple of times when you notice she's having problems. You should see some kind of improvement once she's been on the antibiotics (is it Clavamox or Ammoxicillin??) for at least 3-4 days.

Poor baby!! As long as she's eating and using the kitty box, just keep an eye on her. Keep us posted!