Suggest Treatment For Cold And Sore Throat

I have been feeling as if I am coming down with a cold for 5he past week and a half. I had a little sore throat but nothing to really that bad. I am not coughing, no running nose, nothing. Except, I am running a little fever off and on, very tierd, spitting up dark green flem throughout the day and now I am having a hard time breathing when I do a little bit of movement. What is going on. No I don t smoke.