Why is there a high pitched squeal when I cough? For the past 8 days I have a bad cold, no fever, very little sneezing, occasional nose blowing, throat sore only when coughing--which is not constant but fairly often. Also, I have started coughing up greenish/yellow mucous for the past 2 days. I have been taking the full dose of mucinex every 12 hours. At night I also take Actifed and 2 nights ago added a cough suppressant. The very top of my throat is starting to feel tight, but I can still swallow and breathe easily. Do I need to take something to open the lungs like asthma patients do?