Its day 5 of a cold and I can't take a full deep inhalation without coughing. It's hard to catch my breath also after even walking up stairs. I'm resting, taking tons of vitamins and liquids. Should I be concerned about the breathing? The rest of the days have been body aches, eyeballs hurt, headache, no appetite, chills and sweats. day one was 14 hours of coughing. Now I am spitting up solid brownish mucus. Thank you.