Last year in Feb, I was having a problem in which I used to have excess yawn like an air was stuck in my chest, I get tired by just climbing few steps and would take deep breathes in every 10-15 sec because I would feel like I am not getting enough air. I tried treating this condition from 2-3 doctors and it got cured in the month of August 2020. However, I am feeling those symptoms again. What should I do? What could be the reason and whom should I contact to get cured?