How to treat lung scarring due to RSV?

Hello doctor,

Eight months ago, I had severe RSV lasting for 10 weeks. I am 66 years old, athletic, fit and in perfect health before respiratory syncytial virus (RSV). I took no prescriptions whatsoever. I got RSV from my friend's infant at church. My husband is a double-boarded physician and recognized the RSV very quickly. I had acute wheezing and coughing. I was on five prescriptions (the usuals) for 10 weeks. I was off all medicines and back on the treadmill daily and also at the gym. The one very noticeable thing that has remained and is very troubling, is that every time I climb stairs in my home (about 18 stairs to the second floor) I am quite out of breath. This does not happen on the treadmill but just on the stairs. I am convinced this is damage from RSV. The two x-rays, six months apart are showing scarring from the RSV. I was recently at a high altitude after many visits to that same location, and I was seriously struck with altitude problems. I was extremely short of breath and had to get a prescription inhaler which helped enormously. When I returned to my place of low altitude, my breathing greatly improved. My questions are: Can I improve my lung scarring in any way? Should I get pulmonary studies? If I am not wheezing, will an inhaler help shortness of breath upon exertion? This is a problem for my fitness program and my very busy personal life.