Hello, 4 days ago I developed a mild sore throat on one side, the next day it turned into a cold with a fever of 101, and coughing up yellow phlegm. The fever is gone but still have chest congestion, and now coughing up small amounts of green phlegm. I can t taste my food. My sinuses are congested but getting better, no discharge from my nose other than normal cold nose blowing. Should I be concerned about the green phlegm? My email is: YYYY@YYYY