Have had sinus issues for 2-3 mos., with drainage in back of throat. Most likely a sinus infection. Have had them often. After jogging in the cold for a very short distance, 4 days ago, have had a cough and tastes like blood or metal. Nothing is coming up, maybe just a bit of flem now and then. Cough is more frequent and deeper. Coughing is starting to make me more fatigued. Lungs itch.