Hello First I apologise for being not fluent in English but I will try my best to express my thought, I had quite smoking for more than 1 year now but I still have unusual chest tightness and difficulty breathing, I did all diagnostic tests that may help comprehend such complain, but without being able to figure out what is going on with me. So if any person who may experienced such complain or a specialist who may explain this phenomenon I will be so thankful.