The other night I had been sleeping for about 5 hours, when I awoke and then began to drift asleep again. When I was half-way asleep I began experiencing SP. But it wasn't normal, the side of my back began to feel like it was being ripped from the inside, or a feeling like a horrible cramp. I tried to ignore it, because I was trying to use this SP as a catalyst into an LD. But I think it was too irritating, and I wasn't able to LD. Then it happened again that same night, another sharp pain on the right side of my back.

Is this something that can happen occasionally from the body going into a paralytic state? A side effect such as cramping or something? I am not that worried about it, but was wondering what was causing it. I can't be ultra-positive whether I was actually conscious at the time, it may have been a false awakening with SP, which somehow generated pain into the scenario. This isn't the first time that it has happened though. I recall other times.

Does anyone else have this, and why does it happen? I assume there isn't any actual danger with it. But I don't understand why I was having intense pain during SP.