Ive been having a bit of a struggle with breathlessness even when climbing just a couple of floors, which is unusual for me since Im generally healthy and active. Not too long ago, I had a nasty infection and was coughing up a lot of yellow-green phlegm. It went on for nearly a week, and during that time, I found myself gasping for breath like it was asthma, though it didnt turn into a full-blown attack. I used an inhaler to help with the breathing. An Ayurvedic doctor mentioned that I have very shallow breath intake and low lung capacity. Could you provide some advice or suggest ways to improve this?