Though you are not convinced, hiatal hernia and GERD can cause dizziness, pain and tingling
between shoulder blades, feeling of heart pounding, and
sharp pain in left side of chest. Dizziness (lightheadedness) could be due to acid reflux. The reverse flow of contents of the stomach cause a series of neurochemical transmissions, which cause dizziness. It is also related to changing pressure in the cochlear canals of the ear during this process.