question: Hi I have had a chesty cough for 8 weeks now. I cough all the time and I am still coughing up dark green phlem. My breating does get very shallow. I am also asthmatic and I have increased my inhalers but my peek flow reading is 250 when usually it is 450-500. I have had 2 courses of antibotics: Amoxilin and Ethrithromicin (sorry about the spelling) and still it is no better. I feel tired all the time and cant sleep well due to my wheezing. What do you hink could be the cause? I know I have to go back to my doc. I have had pneumonia as a child before.