I think you might be having acid reflux , otherwise known as Laryngopharyngeal reflux
. Avoid smoking, spicy food, junk food, soft drinks, sweets and chocolates. Don't go to sleep atleast 1 hour after lunch and dinner. You can take medications for reflux e.g. combination of Pantoprazole
tablets before breakfast for 3 weeks. Also go for CT Scan of Paranasal sinuses
to rule out sinusitis.