Sir , I am feeling shortness in breathing since last night. I cannot confirm whether it is related to anxiety or pulmonary disease My problems was diagnosed as anxiety after I had complaints of chest pain . My x-ray results of chest were normal ,ECG was normal ,Echo-Tmt results were normal. I also went under a test where my lung capacity results were normal. Cardiologist informed me that my heart is fine. However I did not told my doctor I was a former smoker. I smoked around 2-3 cigarettes for one year. However I have not smoked since a month. My chest pain disappeared but i am feeling shortness of breathing. Though I cannot confirm is it due to anxiety or cancer .