Ghost, what you are describing is not SP. I too used to think that the the numbness and higher difficulty of moving my limbs was SP, but it's not. I can reach that level pretty quickly nowadays, but it's still not SP.

I realized that it was never SP until the one day I really did have SP. I woke up on my couch, not able to yell or move at ALL, and hallucinated a shadowy figure sneaking up on me from behind.