"If all you have is a hammer ... everything looks like a nail." - Unbekannt
Do you know what else causes these symptoms? CERTAIN PARASITES.
Just as pinworms release chemicals that cause irritation in order to get a reaction that gets their eggs back into the host; -these little bastards cause irritation to get you to cough - cough so hard you vomit (they want to catch a ride OUT of the body). This is why so many people experience the "throat tickle" soon after eating.
While it is true that nerve injury can cause coughing - you need to look to see if there is a PATTERN to the coughing.
This type of infection has been on the rise over the last decade and is often misdiagnosed.
Talk to your doctor to see if s/he may have more specific info on the types & number of parasites that do this.
If not, ask to do a broad antibiotic sweep starting with ivermectin, doxycycline & pyrantel palmoate. Take note of which med cycle seems to eliminate the symptoms & then report back here. Best wishes.