DannyBoy..

keep a journal of what you are eating along with the carb content of each food. Note when you experience heartburn and note what you ate. This will help you pinpoint which foods are causing it. Carbs are not the only thing that can cause heartburn, food sensitivities can also (dairy and eggs being two big offenders). Most (not all) people experience a major increase in heartburn or reflux symptoms when low carbing, many report that it goes away completely. If it doesn't then something else is the culprit. Good luck!