I have been suffering for 4 months with not being able to breath at night. My esophagus is congested with thick mucus, cant spit out or cough out, NOTHING. I've visited and seen Doctors for ENT, Pulmonary, urgent care 4 times, 3xrays of lungs, heart is good, lungs clear, no asthma, no bronchitis. At night is the worst!! I do have Acid reflux and had an endoscopy and it showed nothing out of the ordinary. I am out of options and don't know how to make my thick mucus thinner. if there is something I can take PLEASE TELL ME!! I am 80 years old and the ENT said its an old age thing! REALLY?????