This is probably gastric reflux and it will not kill you. It can be awfully uncomfortable. If it is not reflux the other most likely condition is esophageal spasms, which are mostly due to anxiety.
You can get an over-the-counter proton pump inhibitor (Prevacid, for example). If you take this daily for a week or two it should relieve the problem. You should also use a saline sinus lavage to reduce the post nasal drip problem.
50 yrs old, IBD diagnosis in spring '01. Proctitis, gastritis, ileitis.
Pentasa (3g/day)generic Colazal ( 96 pills/day), Sulfazine (1.5 g/day), Prevacid, folic acid, vit. D (2K iu), flax seed oil (2 tsp/day), psyllium (1/2T daily), mesalamine enema as needed. Gluten free as of 5/30/11. Colonoscopy found no evidence of inflammation on 8/16/1