I realize that some palpitations are normal and that thing where the heart sort of skips a beat and then thuds really hard right afterwards is normal as well. Its just that it happens everyday and sometimes keeps doing it over and over again especially right when I lay down at night. I m a 34 year old in pretty decent condition. I also started a new super intense weightlifting workout. The other day when I finished, I felt ok, but just a tiny bit nauseous. About fifteen or twenty minutes later I was laying flat on my back in a grocery store parking lot on the verge of passing out with a cold sweat etxremely nauseous, though it passed in about five minutes after I laid down. I wondered if this could signal my heart was in distress or a mild heartattack perhaps. The workout consists of very intense sets with practically no rest in between. Am I a hypochondriac or are my fears warranted?