if u feel like u have mucus get some guaifenesin that will clear u out and help with the cough as well. also have u taken your temp to make sure u don't have TEMP.
Monitor your temperature, low grade? productive cough? sometimes colds and flu can lower your immunity and/or progress into bronchitis, pneumonia, sinusitis.....smoker? If you continue to feel yucky probably should see your doctor and let him know how your feeling.
Maybe the flu or they are calling it a flu-like sickness'have you a fever, chills on and off , cough spasms ,headaches and body aches..drink plenty of fluids, if you feel worse go to the doc I just got over it and they gave me Azithromycin and codeine cough med..good luck