CONTINUOUS COUGHING, YELLOW PHLEM, AND CHEST PAIN

Patient: I HAVE BEEN COUGHING UP YELLOW FLEM FOR OVER A WEEK NOW. MY CHEST HURTS WHEN i COUGH. MY THROAT GETS REALLY SORE. SOMETIMES WHEN I COUGH UP FLEM, I NOTICE THERE IS SOME BLOOD MIXED IN AS WELL. I HAVE BEEN TAKING MUCINEX DM FOR THE PAST 5 -6 DAYS AND I STARTED TO FEEL BETTER. I WENT BACK TO WORK TODAY AND I DIDNT TAKE THE MUCINEX DM TODAY AND NOW I FEEL LIKE IT STARTED ALL OVER AGAIN. WHAT DO YOU THINK IT COULD BE?

Doctor: