My son had one collapsed lung and one partially collapsed lung at 2 1/2 months old. He had been back and forth to the ER and the ped all week long with RSV, and by the end of the week he was really really sick and was transported (WITHOUT ME!) by ambulance from the ped to the Babies and Childrens Hospital. He was hospitalized for 8 days. They told us he might be prone to asthma, and he does gasp like a carp a lot. Even while sitting still playing video games (he is just-turned 6 now). He finally explained recently that he gasps periodically because he feels like he can't breathe sometimes. Gonna get him checked out next month, bet he has mild asthma.
Sorry you are going through so much pain!