I have atrial fibrillation that is apparently triggered by eating, as well as lifting. I also have GERD. You have received some excellent suggestions.

I don't eat after 5 or 6pm. I take Tums at night, and sometimes Pepcid.

It doesn't sound like you have diabetes. When are you below 70? Is that a few hours after sugar? I would stop the hard candy if you can, and always accompany simple carbs with protein/fat.

Heart, lungs, GI system are all close together and affect each other. GERD can also give me asthma-like symptoms.

I think you are on the right track. It is hard because docs tend to address one system or organ and we need to have them connected!