So I lay in bed thinking about breathing or counting and eventually I can feel my body becoming numb. But I never feel the wave of SP or the vibrations or sounds. I don't think I've ever reached SP probably because I can't keep my eyes from moving around. I have my eyes closed but can't keep from moving them around, which is why I think I've never gotten SP. Is this right? How can I stop it?

Or is there anyway I've already past SP without realizing it?

I normally lay in bed for like 30 minutes trying, is this long enough? I try before sleep and after 5 hours for better REM.