I have been struggling with this lately. I have experienced everything from seeing my neighbor washing his car as clear as day and then turning my head and there was no one there to seeing a wicked hand try to grab me. I have seen shadow after shadow, cars that aren't there. Most of it I recognize as hallucinations or my mind playing tricks on me but, now that I am alone so much, I often go to my parent's house and maybe even spend the night there.