Hi, i have had a chronic cough for about 10 months now (cough is initiated by myself, i make myself cough, it is not frequent either, and when i am sleeping i do not cough), i also started to cough up yellow and brown phlem, wierd thing is that i think that my chest feels better after coughing this up, and hopefully maybe this is the end stages, i am 27, i am an ex smoker, quite about 4 years ago, i also had an atypical pneumonia/bronchotis last month, and was taking antibiotics, could you just tell me if i should go back to the doctor, or just wait this out, thanks so much for your time.