Can gas get stuck in your esophagus and cause it to expand and cause chest pain? or is this acid reflux all test done on heart & nothing is wrong.

Absolutely: food and air can get stuck going down esophagus, and cause a severe chest pain that is relieved by burping or swallowing something. Also reflux of stomach acid into esophagus can cause a burning chest pain that is usually relieved with antacids. Esophageal spasm causes severe chest pain, it is usually provoked by severe reflux. Check out my website http://CardioGauge.com for heart health education