i have had a cronic cough for over 2 yrs and have had all kinds of tests and doctor visits and meds for over 2 yrs. i was told to try the sinus rinse

i have had a cronic cough for over 2 yrs and have had all kinds of tests and doctor visits and meds for over 2 yrs. i was told to try the sinus rinse. i still have cough with sticky phlemg - but seems not as long as before. i have spent alot of money on doctors who are scratching theirnheads and saying i dont know what else to do. some say copd -some say allergy related some just dont know. i only hope this will help. thank u..