Unknown coughing and gagging?

For over a year now, I have had this cough that came from seemingly nowhere. It's a sort of a dry/itchy kind of cough, and it's persisted every day for around a year. I don't smoke nor have covid19, or any recorded illness or health problem, I am 20 years old. I also for some reason have also been gagging/getting a gag reflex after any time I eat or get full from eating. Not sure what these are and what caused it.