Why couldn’t I fly?

Date: 10/13/2018

I was doing something, I don’t remember what, when I became lucid. I was in bed at night facing the window. I was on my stomach and my head was turned right. I remembered to stay calm. I repeated to myself that I was dreaming. I said “fly.” I expected to launch out of the window and up into the sky, but I didn’t. I reached for the window. Then I was gripped with this weird type of sleep paralysis. It was sort of tingly and I could move my fingers and toes. There was no monster like I had read on the internet. I wasn’t scared, just annoyed. Then I woke up. But it was a false awakening into another dream.