I am a 19 year old male, 125 lbs about 5'9".
Last night, I was laying in bed and felt my heart rate. It was very fast (150~ bpm). It started to slow down, and all of a sudden my body has numbness and pinching tickling sensations in my arms and my toes. Still feeling my heart rate, All of a sudden I felt no beat, as if it stopped. I got a rush of coldness through my body and severe disorientation. I panicked and got out of bed and and breathed faster then normal on purpose. I could then feel my heart pumping again inside my chest and some of the disorientation went away but the prickly numbness in my arms did not subside till I fell asleep.