Doctor I am 18 neither I smoke n I eat tobacco. Bt I am facing breathing problem i.e. Unable to take deep breath from last 1 n 1/2 months n last week I suffered from cold due to which I had to spit sputum as a result I feel somewhat relieved bt now no sputum comes out bt I still feel I am not able to take full oxygen in lungs due to which I feel irritated. N since when this breathing problem started, started to feel a light heaviness on the left chest area (at the end of ribs) when I fall on bed with body straight for sleeping this also causes more difficulty in breathing n when I bend on left or right side I feel no heaviness earlier it was not regular bt now I feel this heaviness regularly making me uncomfortable sometimes at the end of left ribs n sometimes in between the end of both ribs. The heaviness I like a light pressure. N I am having hypothyroid which I got tested 3 months ago n I took medication of it i.e. Thyrobless for 20 days. My exams r coming n I am unable to study becoz of the anxiety of some serious problem. What is the reason for heaviness n the problem of unable to take deep breath?