Every once in a while it feels like my heart skips a beat. could it be due to my acid reflux or would that not be the problem?

Unlikely: Acid reflux is unlikely a cause of cardiac irregularity. Skip beats are due to extra beats that arise in the lower chamber ( pvcs) or upper chamber of the heart (pacs) and are often benign.

Skipped Heart Beats: What is referred to as a "skipped heart beat" is due to a premature beat of the heart. This is a harmless condition and most people do not even notice it. However, some people do feel it, in some cases making people nervous and rarely making it hard for a person to function. If it produces such symptoms, it can be eliminated by medications, but in most cases that is not necessary.