I count in my head to relax.

With me, I'll just be lying there, and get a small urge to move. But as time goes on, it gets bigger and bigger. After about like, 5 minutes of this, it stops, and I'm in SP.

Don't worry too much about it. Just lay there, and think about anything, as long as you are relaxed. It can take anywhere from 10 minutes to an hour for urges to come, just be patient!