Well I tried a wild for a 2nd time this morning after about 4 1/2 hours sleep.
I kept getting this an intense itching on the tip of my nose.
If I even moved slightly it would go away.
So I just waited through it. Didn't take very long for it to go. Next thing I know
I felt the hot fuzzy feeling rise from my feet to my head. And some noises in my ears.
That was sleep paralysis kicking in right. Unfortunately just feel asleep after that (restless night). I think I must've went into a non-lucid, and didn't remember it on waking up.

Anyhow, I think the itching thing is two different things.

If you have a real itch and you've just started meditating, maybe its best to have a good scratch and remove the distraction.

If you have the imaginary SP Test itch, you need to leave it well enough alone.

If you can't tell the difference, then just leave alone.

I would say that when I got the nose itch, and moved, it came back quite quickly, so didn't set me back that far.