This can be due to bronchitis. You may travel to coast. This is not likely to be serious. Your doctor may also consider a possibility of reflux laryngitis. Following investigations may be able to confirm it;
1) Barium esophagography
2) Ambulatory 24-hour pharyngoesophageal pH monitoring
3) A biopsy of the larynx which may show laryngitis.
Following measures are helpful:
1) Small 5-6 meals a day.
2) Last meal should be eaten 3 hours before lying down.
3) Avoid; fried or fatty foods, chocolate, peppermint, alcohol, coffee, carbonated beverages, citrus fruits or juices, tomato sauce, ketchup, mustard, vinegar.
4) Eat slowly so air is not swallowed.
5) Swallowing therapy by a speech-language pathologist.
6) Lose weight if obese or overweight.
7) Elevate the head of the bed by 6 inches.
8) Avoid tight clothing.
Please see the resource;
An associated anxiety may be occasionally the concomitant cause.
It is privilege assisting you.