I just ate a sonic chilling dog. And was laying down watch a movie. Not stressed or concerned about anything.  My heart started beating fast like a flutter. But i continued to lay there and did not move and then it stopped. And. Moments later about 10mins to started again. Concerned me much be cuz. It lasted longer than before.  I got up and then other it was hard to breath like my passage was closing. And saying. Slow down slow down. I splashed cool. Water on my chest as I was talking out loud to Slow. Down.  Eventually it fiNally did and now im Surfing the internet and found you.
It looks like you suffered some kind of arrhythmia.it could be atrial fibrillation or Supra ventricular tachycardia. You need full cardiac evaluation with an ECG and ECHOCARDIOGRAPHY.get back with reports.