I have had a ongoing cough for 8 years with a phelm that progressively gotten thicker and is now choking me. I have been spitting it up or coughing it out. I am been thru asthma tests, bronchitis tests, acid reflux and no positive results. I am highly allergic to many things but the allergist does not have answers for me except that possibly my body is producing phelm that is too thick. Help me...I am desperate.