Dry cough while eating or swallowing.

Hello, I have been suffering from from dry cough while eating or swallowing food. As soon as I start swallowing food, cough starts. I do have a sip of water to mitigate cough, but the cough doesn't stop entirely. This started in the year 2014, when I used to have cough while eating for the period of 3-4 months in a year. In 2016, I referred this to a doctor, however, I didn't get any relief. In 2018, I took an ayurvedic medicine and I got a mild relief. In 2019, I did not have any cough. In 2020, I again started to have cough while eating. I consulted to a doctor again and I got a mild relief. However, after some time I again started to have cough. Now it is prolonging for more than 6 months now. Earlier, the cough used remain for only 3-4 months in each year. Now it is already 7 months and cough  still persists. I wish to recover from this cough permanently.