question: It feels like there is a bubble in the left side by my lung and it sometimes hurts to breathe. it feels like there is a pocket of air almost on the left side of my lung and it gets harder to breathe and more noticeable when laying down. I just had an allergic reaction last thursday to some medicine and they gave me a steriod to open my lungs up. But, should i get checked to see if this is pnemonia?