i quit smoking a little over a month ago.  for a month now i have had the strong, uncontrollable cough with phlegm and i am always out of breath which makes me lightheaded.  i also have had some fevers here and there.  also my nose is stopped up a lot.  every time i blow my nost the back of my head and neck hurts so bad.
Thanks for your question on Chat Doctor. I can understand your concern. Since you were a smoker, we should rule out lung infection and bronchitis in your case. Both these diseases are common in smokers and cause similar symptoms like cough, expectoration, fever and breathlessness. So better to consult pulmonologist and get done 1. Clinical examination of respiratory system. 2. Chest x-ray 3. PUT (pulmonary function test). Chest x-ray is needed to rule out lung infection. PFT is must for the diagnosis of bronchitis. You will mostly improve with antibiotics, inhaled bronchodilator, inhaled corticosteroids and other supportive Chat Doctor.  Don't worry, you will be alright with all these. First diagnose and then start appropriate treatment. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.