Dear Doctor, I am an ex smoker who has recently caught walking pneumonia 2 weeks ago. I have, for the last 4 days been suffering with a horrific cough that has a burning sensation to it and a sulfur taste as well.The mucus also randomly shifts into my throat and burns upon contact with my thyroat, right by my tonsils and then the horrific sulfur taste occurs. A few times, my whole throat was closed up and I couldnt breath out or in. The color from this mucus and cough is usually a pea colored or pale yellow colored mucus.