Hi there, for the past couple weeks i ve been having some breathing difficulties. 1) its hard to breathe through my nose, feels like its blocked but theres mucus 2) lungs sometimes feel heavy or tight . I did have a cold about a month ago and cough up a bunch of phlegm. When i breathe i can feel a rumble in the middle of my chest, sometimes it goes away. I am a smoker and i also have anxiety disorder. Ive been to the ER 3 times last year because i felt like i couldnt breathe. They gave me an ekg and xray, said everything is fine. Saw my primary doctor in May and told her about the rumbling in my chest and heavy breathing, she said my lungs sounded fine... It feels like my breathing has been getting more difficult and just wanted to ask on her for advice before going back to see a doctor. My lungs dont hurt, its easier to breathe laying down. Could this just be my anxiety?