hi... i have had dry cough every now and then, and sometimes i feel out of breath. i don't have fever or anything but i was shocked when i tried to stretch and twist my body i felt that my chest is like a balloon, inflating and deflating. when i twist my body, i breathe through my mouth and i can hear and feel the air coming in and out of my throat. it really sounds like somebody is inflating a balloon. it is my first time to experience this, i usually stretch and twist my body before i go to bed, i was shocked when i actually felt and heard a balloon like feeling in my chest. i'm worried that i might have a lung problem.