I have had this condition for about 2 years now and it occurred right after I had a bad cold. I have taken zyrtec, claratin, and nasal spray, but I still have no luck. My doctor said I have no sign of allergies too. And I never have heartburn so I doubt it's acid reflux. Ive noticed this condition worsens after I eat lunch. I have tried eating healthier but when I eat vegetables the condition just goes away for about five minutes. This is also affecting my life at school because I can't do as much as other kids because of losing my voice and having to cough constantly.