I've been coughing for 4 months now. My phlegm in the morning is brown and turns from yellow to clear as I continue spitting up. I'm also wheezing which sounds like a light snore or a humming noise. I don't have any chest pains or shortage of breathe although my chest can feel heavy at times from the phlegm buid up until I spit it out., but it seems to never end. Sometimes it'll skip a day or two, but the cough and phlegm always comes back. I've tried all types of cough medicines as well as Munciex, but nothing seems to help. I don't think I have asthma or broncitis so i'm just wondering what type of lung infection I may have and is it serious.