Hello! I think I had a lucid dream today and I seem to encounter a problem when I know I'm dreaming. Here is what happened.

I was in my home kitchen and I noticed that when I looked at my living room there was a big open space in the middle of the living room. I walk slowly and to the middle but I hear something coming out of the other room. I get scared and wonder who it was. It was just my small little Niece. I made this horrified scream and decide to open my eyes. When I open them I am in my bed but something didn't see right. I did a reality check(holding my nose to see if I would breathe). I then realized I was dreaming and said out loud, "I'm dreaming." It was a little hard for me to get the words out and I couldn't move at all. I felt some kind of force trying to keep me in the bed.

Is there a way to overcome this problem? I recently had a couple lucid dreams(last month) and I can't move when I realize I am dreaming in them too.