Palpitations

I have palpitations (the fluttering flopping fish feeling.) I never had any issues until my first pregnancy I had them at the end often. It went away for about a year and came back just a little when my 2nd pregnancy came along. After that for a year off and on randomly they would come and go & still do. I havent asked a doctor because they go away for a while but boy when they come it scares me. Imagine sitting still and your heart is flipping around out of beat for a second. It never happens longer than a second & ive read it’s usually not a cause for concern but wanted to know if anyone had anything like it.