I am 4 days post op, and today I coughed up red phlegm or mucus. The past 3 days I have coughed up one, brown to green phlegm per day and figured it was from the breathing tube during general anesthesia. Now I'm sort of freaked out because it was red. Is that normal? I feel fine otherwise. I left a message with my PS but haven't heard back yet. Help please!