A lot of my anxiety come from me worrying about my heart. Nothing is wrong with it, i saw a cardiologist 4 years ago. They never called back when i finished with my heart monitor so we just assumed i was fine. 

Today during class, my heart did that thing where it pauses, twitches, pauses a bit more, then goes back to its normal rhythm

Just now i was eating, and it almost did the same thing. It skipped a beat. But it didnt feel like normal heart palpitations. Like i could really FEEL it stop for a second.