FIRST OFF IVE BEEN A SMOKER SINCE I WAS 12 AND A MARAJUNNA USER SINCE THIRTEEN. I SMOKED MAINLY MENTHOL CIGEREATS. RECENTLY I'VE QUIT BOTH. BUT BEFORE I QUIT I STARTED TO HAVE THIS COUGH. IT STARTS AS A BURNING IN THE MIDDLE OF MY CHEST, THEN FEELS LIKE A ROLLING BURB. AFTER, I SPIT UP LIKE JUST A BUNCH OF SALIVA. ITS NOT JUST YOUR REGULAR SPIT. NO DISCOLOR BUT IT HURTS AND BURNS. IT HAPPENS IN SPELLS. LIKE IT WILL HAPPEN FOR A FEW MINUTES AND THEN GO AWAY. IVE READ UP ON ACID REFLUX, BUT IT DOESNT SEEM AS IF I HAVE ANY OF THE SYMPOTOMS OTHER THAN THE BURNING IN MY CHEST. WHAT CAN THIS BE AND HOW DO I STOP IT?