Not saying it wasn't actually someone but it was most likely night terrors (sleep terrors). Not to be confused with nightmares. Children can experience night terrors at that age. Sleep walking is one of the symptoms and it affects roughly %40 of children.
I had to change bedrooms as kid to one with a lower window and start putting a board under the doorknob to stop me from sleepwalking out the house. Farthest I ever made was about a mile, woke up on shoulder of highway cause stepped on something cut my foot. Limped back home mix of walking on pavement and grass ditch at 2 AM.
It was most likely a night terror, I've had something similar like that I still do from time to time. It's hell because everything feels and sounds so real, where lucid dreams and reality collide. You're awake but dreaming at the same time. Most days I can't tell if I am awake or still dreaming then I have deja vu all day long.
Forget abducting, I think that was a God damned demon.