Ever suffered from the pain in your chest? People tend to confuse the acid reflux symptoms with the heart attack as both phenomena have chest pain as one of the signs. In addition, when the person faces tightening of the chest and feels unable to breathe freely, the pain reminds of the typical heart attack. When you have a chest pain caused by the acid reflux, it lasts for a while, being more intense. If you breathe deeply, you might feel the pain is intensifying. At the same time, the cardiac pain stays on the same level.