I am a 27yr old female with a cough which has lasted nearly a year and is especially bad in the morning. I smoke 20 cigarettes/day. I have had a recent virus/chest infection and feel severely fatigued, two visits to the GP and I was diagnosed with asthma. Inhalers do not work, I asked for chest Xray but was told it was unnecessary as my chest was clear. Should I still be worried?