Left sided pain may be heart related,
and sometimes heart related pain can radiate to the shoulder (left)
and arm. Is there pain to your neck or jaw at all?
Mucous that is other than white, clear, or light yellow is concerning. Is there blood in the mucous? Discolored mucous may mean pneumonia or bronchitis. Bloody mucous may mean a blood clot in the lung. Huge risk factors for a lung clot are: diabetic, smoker, overweight, drug abuse.