Hi, your symptoms could be due to reflux of acid into the esophagus, which can cause the burning sensation.
Heartburn and GERD are interchangeable,
heartburn is more of an acute disorder and GERD is chronic. GERD (Gastro Esophageal Reflux Disease), where the acid contents of the stomach came up into the esophagus. A hiatal hernia occurs when part of your stomach pushes upward through your diaphragm. This can also cause burning and pressure sensation in the chest.