Is it possible to overexert yourself? My chest seems to be tight and burns a lot. I think that I have got asthma. I have these feelings for few days. I was feeling sick due to suspected covid-19 for a few weeks. After few days, it was getting better. Then I overexerted myself by carrying heavy bags. After that, I started to experience intense tightness in the chest with shortness of breath. They were worse than before. Then I went to the doctor and he does not see anything wrong with my heart or lungs. He told me that it can occur due to stress and anxiety. He gave me Ativan. What is going on in me? Will these symptoms are caused due to stress and anxiety?