OP
it sounds to me like you OBE'd last night. While out of body a dark spirit tried to step into your body. Symbolically the house is your body, the door which you closed is symbolic (as well) of you leaving your body unprotected while you were out of body, allowing any spirit the means of stepping through and into your body.

In the future before falling off to sleep ask your spirit guide(s) to watch over you (if you're religious pray to god for protection) it doesn't matter what you belief system is only that you do believe, there is protection available to you. Surround yourself with golden-white light of protection imagine it as though it were a sphere of light encapsulating your body.