Qualified Medical Opinion Please...HELP!?

Unfortunately I have more questions for you than answers at the moment. Do you have any tightness/pressure in your chest? After coughing to do you have to catch your breath or vomit as a direct cause of the coughing? Does the cough get worse at night? Have you had a chest x-ray? Two things imediatley come to mind with the symptoms you have currently listed, Pneumonia and Pertussis (Whooping Cough). Neither for your age would prove life threatening unless untreated, though Pertussis will cause you be locked indoors for 5 days (Don't go loopy on us!).