You have not mentioned how long have you been smoking
. If you have been smoking for long, it is possible that you have developed chronic obstructive pulmonary disease
which is causing your symptoms. If you were diagnosed with a lung infection
and prescribed antibiotics, and you are still not well, then please see your doctor again as soon as possible and discuss this. You may need further tests or a change of antibiotic. Last but not the least, consider quitting smoking, if you wish to lead a healthy life.