Is this a strong pulse or something else?

Is there any way you can be more descriptive? Was it literally your entire body or was it more localized? How long after you were lying there did this happen? Was it painful? What did you to to stop it?

It is quite possible considering your frame size that just the position your body was in and you were relaxed enough that your heart beat could have been felt throughout your body. However, I doubt it would make you (what sounds like to me) convulsively twitch. Do you have any significant past medical history? There are too many factors and questions to ask if you seriously think there is a problem, the bottom line is you should see a physician if so.

Good luck.

This is not a place to get medical advice and is against the TOS. You should speak with your health care providor.

as per site terms of service we are unable to offer any medical advice. you really need to discuss this with your own doctor

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