Hey there. I'm new to the forum but not new to the lucid dream subject (my aim here is actually Astral Projections).
I had very few experiences however.

Today I had an interesting experience, I had an SP on the morning (I wake up 4 hours after falling asleep and it was already daylight).

I kept like an hour with binaural beats to help out my concentration but I kind of couldn’t concentrate well because my irritated nose.

After sometime I decided to give up, and went to sleep. But I occasionally opened my eyes and I was totally paralyzed. I looked to my finger and couldn’t move it. I was pretty sure what I was seeing was the physical world; I was definitely with my eyes open but no movement at all. (unless my brain tricked me very well this time!)
I didn't freak out and took a deep breath and I returned. Then a few minutes it happened again, I let it go and slept.

Any explanation?

I'm not experienced in WILD.