ok. I quit smoking 4 months ago. I have tried to change my diet and have been exercising in a gym. I am also a musician and I sing. On Saturday...I exercised and then played a show that night so I was using my lungs. everything felt fine. Sunday morning I woke up and I would breath in and I could hear the air wheeze into my lungs after I stopped breathing in. kind of like...that section of lung just kind of opened. the wheeze only lasted maybe an hour but now I have a pain in my upper right chest. not sure if this is a pulled muscle or lungs repairing themselves or something more serious. thanks