Okay, so a while back I sprained my wrist really badly and nearly blacked out. I lost all physical sensation for what was most likely just a few seconds, including my wrist, and even started seeing what I can only think is the Astral Plane. Then someone in physical reality was shaking me awake. Did I come close?
sometimes when we are in pain are mind seeks to escape it so it is possible you did. You could try meditation to see if you get the same feeling that you did before though sometimes it can fell different there are many planes and not all have the same felling its how we can guide are self to different ones