Hi Jadilow, You are so young. Look up reflux to see how you can manage it. Ginger helps. Even a little baking soda in water can stop it. Tums that are pure calcium and no aluminum is also good. You want to avoid drugs. But of course, prevention is best. Don't lie down soon after eating. Sleep on your left side. It isn't related to the heart even if it is called heartburn.
As for the flip flopping heart, do you feel faint or short of breath during these episodes? My cardiologist told me when I had lots of 'flip flopping' that he only medicates if the palpitations or arrhythmia interferes with normal functioning. In my case I did feel faint and weak because the sensations were non stop. So, I think if you were to see my cardiologist...olke your own, he would tell you not to worry, to never have coffee, tea, alcohol, to go easy on the chocolate and steer clear of any stimulants (dental meds, cold meds). I hope this helps, Jadilow.