Hello Welcome to health care magic Dear patient, we call it MBBS third year syndrome, when we doctors enter the 3rd year of MBBS and start getting clinical teachings, and are told or after going through the books which says that if a patient complains of such such symptoms then they will be having so and so disease, we use to think that these symptoms are present in my self also and probably we are also having the same disease , then when we use to consult senior doctors they use to counsell us that there is nothing wrong with us , same way when you will read about symptoms of a disese in the net ,you can develope the same feeling. It is extreamly rare that a person who has got exposed to H1N1 and had not developed clinical disease ,will develope long term sequale due to sub clinical infection . Your chest symptoms might be related to the dust ,smoke , perfumes or other pollutants or irritants near your working place or residential place . You can consult a pulmonologist who will do the necessary tests like chest X-RAY , Sputum examination for gram stain and AFB stain , PFT or any other necessary test to find out if there is really some thing wrong with your lungs or not and will advise you accordingly Thanks Dr Arshad