This does sound like asthma. The chest x-ray is almost always clear with asthma. In fact the lungs are sometimes enlarged, especially during an acute attack, and can appear clearer (darker) than usual on x-ray. Other breathing problems that can mimic asthma are sarcoidosis, cystic fibrosis, bronchiectasis, and chronic bronchitis. However, asthma is much more likely to be the correct diagnosis.
Consider going to the Mayo Clinic, if asthma is not the diagnosis or your symptoms do not improve with the use of asthma medicine. Otherwise going would be a waste of time and money.
Relax spidy!!!
I'm a Registered Respiratory Therapist who is also credencialed as a Certified Pulmonary function Technologist (CPFT)
Your PFT sounds fine. You may have a component of Asthma or som type of reactive airways disease. But dont fret. You're condition is treatable and controllable simply by using bronchodialators. You need to speak with your doctor and have him explain to you in terms which YOU understand. Otherwise, you will continue to be lost and have all this unecessary anxiety!
-Andty, RRT,CPFT
Calm down & TALK with your pulmonologist. Have him/her explain the test results and figure out what treatment would be best for your condition. Be aware that it may take a while & some "trial & error" to figure out the optimal treatment plan for your condition. Also, the treatment plan may change as your condition changes.
Since your lung function did significantly improve after bronchodilator, that's GOOD & your doctor can help you with that so that hopefully you will have better lung function more of the time.
You can always get a second opinion & evaluation, but be sure you have a good understanding of the first opinion before you rush off to get another evaluation.
Aloha,
Starion