Strange things are happening to me

This is going to be a lot of reading so just hang on. I understand when you start getting into the whole world of paranormal things you start seeing things. And I am not really sure if it is because my mind is scared or whatever, but the thing I don't think I am really just seeing thing anymore. This all may sound crazy but trust me. When I was younger (probably about 5 years old) and before I was into paranormal things, I clearly remember, One second before I continue here is the layout of my house. So first you walk into the mudroom and if you look in front of you there is a stairway but that is not important. Then in you step forward and turn right is the kitchen. Once you are in the kitchen there is a hallway, in the hallway there are 2 bathrooms and me and my parents room. There is one little bathroom at the end of the hallway and a big bathroom at the beginning, with my parents room across from it. Anyway so me and my big sister were watching a movie and I needed to use the bathroom like any kid, so I went to the little bathroom and when I got out my sister walked from my parents room to the big bathroom and so I waited for her to cross the hall and went back to the movie as I sat on the couch my big sister was RIGHT there! If this story made sense to you please I want to know is there a shape shifter in my house or what? I have one more shape shifter story but I will save that for another time. Thank you and I am open to any help on this.