So the weirdest thing happened to me last night..I was asleep and around 1/2 am in the morning I woke up and all of a sudden it felt like someone was pushing down on my chest and my heart was pounding very fast..I was sure I was about to die and literally seconds later it stopped and I took a deep breath and went back to sleep..what could that possibly have been? I'm pretty sure it wasn't a dream..I am active and only drink and smoke occasionally..can someone help me with an answer, do I need to be worried??