Congrats to your first lucid!

I believe, it's quite normal to feel your sleeping body while in lucid dream. It just means, you were not sleeping deep enough yet, or something is stimulating you. This happend to me, when my cat laid down next to me and could feel her body, so in the lucid dream, I was fully aware of my dream and my sleeping body at the same time. Not sure if it has a name.

Oh, and your English is great Happy dreams