I am experiencing headache, runny nose, nasal drainage, sore throat, cough (worsened by: in the evening, at night) (quality: with phlegm or mucus, chronic cough), chest congestion, body aches and sneezing for 2 wks.

Sounds. like our old" friend" INFLUENZA....Take Tylenol or a NSAID for the fever/aches...drink lots of fluids...REST and if it goes into a third week have a hands on exam by your PCP (Primary Care Provider) WHO SHOULD ALSO KNOW what viruses are active in your community. Hope this is helpful..FEEL BETTER Dr Z.
Evaluation. After 14 days of these symptoms it is reasonable to obtain medical evaluation. Although there are some viral infections that can have sx's that last a long while.