Dimension X

Wow. Incredible. After months of having no fully lucid dreams, I finally had one! it started like this. i opened my eyes in my dream, i was in bed. so anyways my bed was rotating once again... in real life i have a fan next to my bed. in the dream, it was nowhere to be found but i could still feel the air blowing on me. i was in a dark room. but i soon realized it was not my bedroom. and i was 100% aware i was dreaming. but theres a bit of a problem. i could barely move. Does anyone know why this is...?! I was completely lucid in the dream, but I was like "Frozen" I guess... I could move my arms maybe about a few inches across the bed, but that's about it.... I even found it difficult to open my mouth, and especially difficult to talk. The room was kinda big. and the ceiling was pretty high. i remember seeing light coming in from the windows. not much though. everything was still pitch black. I had pretty much no control in this dream, which actually makes me sad considering that this is the first one i had in a while. Another weird thing... as soon as i entered the dream (which, by the way, happened twice), i could hear my moms voice saying random words. quite loudly too. But why was i so weak in the dream...?! Seriously, I need some help here.