Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. You must keep one thing in mind. Ifg you go against your conscience, you are liable to have anxiety. Means, you know the ill effects of smoking. You actually do not want to smoke, but you are compelled to do so. That behavior do cause anxiety. That could be one reason behind the feeling. Second, you must visit your physician and get your lungs and chest checked for possible problems. breathless could mean so much for the lungs. Please consult a physician as soon as possible. You might need psychological counseling and or psychotherapy. Please visit http://psychocure.webs.com for behavior modification, mental health assistance, Cognitive Behavior Therapy and other psychotherapies. Hope this answers your query. Available for further clarifications. Good luck.