I have been fighting type a flu, now my cough is worse, wheezing, literally choke just to cough up nickel size blob of brownish green stuff. Have history of pneumonia, COPD, CAD, CHF, Diabetes type 2 amongst other things. Have had to increase oxygen from 2 liter to 4 to feel any help breathin. Never had flu before and don t know if this is the progression it takes or should be concerned about pneumonia