Since most of us aren't medical personnel and have never seen you, it would be irresponsible to try to advise you. You did the right thing in seeing a doctor. If the symptoms continue, then call your family physician and insist on further investigation.

That said, what exactly were these "palpitations"?

It is not unusual to be able to feel your heart beat - sometimes it seems much stronger than other times, especially if you are worried.

Was it irregular or racing? That is the typical description of "palpitations" not just a noticeable heart beat.

If it was not accompanied by feelings of weakness or pain, then it is probably not very important.

I see from your profile that you are a relatively young man. I assume you are not on high blood pressure medication? That is important. If not, then you could add a bit of potassium in the form of No Salt on your food. And perhaps add some more veggie or salad carbs to your diet.

Hope you feel alright soon. But do look into low carbing and get the book for whatever plan you choose.