Neil -   I see you are an MD.  I have also noticed you copied and pasted the same exact response on quite a few questions.  This is the problem with too many MD's.  They don't listen to the patient or the question, and just mindlessly spout out a canned response.    The concern was for a pause in the beat, and a fluttering sensation.  I had these in the past, and it was difficult to diagnose because it took several visits to get it to actually happen on an EKG.    I was having premature ventricular contractions.  My doctor assured me it was harmless.  Connor, you may have that, or you might not.  Either way, Neil is correct in saying you need to be checked by a doctor.  I would recommend a cardiologist if possible..