I was having symptoms from a head cold but 2 weeks later i am still having a runny nose and coughing (well chocking) to get out green phlegm. advice?

Antibiotic: Good for you for waiting out what may have started as a viral upper respiratory infection, but your symptoms are lasting longer than a typical viral syndrome, and the discolored discharge indicates probable bronchitis or sinusitis. See a dr (e g primary, ent, or urgent care) to get on an antibiotic. You may wish to use otc Guaifenesin and saline sinus rinse (e g neilmed) as well. Best wishes.