please help me, what have i done?

i fell asleep and had this feeling of falling. I hear a child's voice. It is the voice of my nephew saying "hi michael!" excitedly.I opened my eyes.... nothing.

creeped out, I try turning in bed but can't. an invisible force was keeping me from turning. Unsure of what this force was exactly i decided to keep trying to push it away, but it kept pushing back... almost playfully...

I became fascinated with whatever this invisible force was and kept trying to push at it. questioning:"what could it be?"; "could it be sleep paralysis?; maybe a ghost?". Unscathed by whatever it was I decided to try something experimental I've always wanted to try.

I told the ghost politely to go away, it didnt. So I decided to state a more powerful phrase. I said "by the power of god, I condemn you" . When I said the words "I condemn you" my voice became very deep and demonic. Frightened , I woke up and it was all gone.

After waking up i went to the kitchen to get a drink. While pouring myself a cup of carrot juice , i heard my mother's voice asking "sweet heart? Is everything okay?... sweetheart?"

My mother was asleep, and her door was closed. I asked if she called me, and she said she didn't.

wtf happened ? could someone explain this to me? Scientific or Spiritual ... it doesn't matter , i just want explanations of what people think it could be so i could try something to make it stop. so if it happens again i can just go to sleep.