What Causes Persistent Sinus Drainage, Headache, Dry Cough And Bodyache?

Started with sinus drainage, then headache and body aches. Began last Tuesday. Thursday, I began taking Daytime OTC medicine for a severe cold or flu with a Tylenol base. Could not shake the headache until Saturday evening. The sinus drainage has subsided significantly. I stopped taking the cold medicine and went to straight Tylenol last night, which alleviated the headache. Today, the body aches continue, plus I developed an occasional, deep cough around Wednesday. It is still with me as well as the fatigue that has been there since Wednesday as well. All this started after visiting an Urgent Care facility with my wife who had developed an infection in her leg after taking a fall a couple weeks ago. While sitting in the waiting area, there were at least 2-3 people coughing with runny noses, among who were two children under the age of 1 who did not cover their mouths when coughing constantly.