I'm assuming when you say "sleep paralysis", you actually are referring to REM atonia, a normal part of the sleep process where your brain disables your muscles to keep you from acting out your dreams. For more info on what sleep paralysis actually is, check out this thread: http://www.dreamviews.com/wake-initi...explained.html

As for the scary HI, I wouldn't be too worried about it. Getting yourself too worked up over the scariness will pretty much kill your entire WILD attempt. Plus once you make the transition into the dream and become lucid, you can always teleport into a new dream, or just make the current dream much less scary by knowing that nothing can hurt you.

Another thing to know is that when you experience this "paralysis", 9 times out of 10 that means you're already asleep and in a dream. Try doing a motionless reality check (my favorite is to imagine your body rocking back and forth without moving your muscles. If you're dreaming, you'll usually rock and roll right off the bed).