I recently tried to have a nap sp. After a couple hours of nothing whatsoever, I drifted asleep, and woke up a few minutes later. I tried again, but this time I think I got somewhere.

After lying completely still for around 25 minutes, I felt something like this numbness come over me. It was like nothing I'd ever felt before. It was almost like I was floating, and my body had no particular orientation. I felt like I was sinking and being enveloped by the mattress, even though I had no blanket over me. I stayed this way for another 30 minutes, but had no HI or strange sounds. Was this sleep paralysis or just numbness?