@tonyagregg and @gabrielm
I have the same issue . I feel that something is going wrong in my chest muscles or diaphragm that i cant feel a relief untill i yawn , so the air can pass into my lungs deeply making me comfortable . I use to yawn alot , but sometimes i can feel satisfaction with normal breathing "no need to yawn" ...I am still 25 years old and i am really sad that this situation my affect my breathing and ventilation in the future