That sounds like palpitations. I had em because of dehydration & stress. Yeah, that's exactly what they are. Spicy foods, stress, alcohol, sugar, even indigestion can bring them on. My first clue that it wasn't actually my heart (besides not being short of breath, in pain, dizzy, etc.) was that I never get them while exercising. Working out helps relax me, so they're never noticeable then.