A Story I Heard From a Friend Long Ago

I love horror and the occult, but nothing like that has ever happened to me, so this is a story I heard... When I was about the same age as an elementary schooler, my sister and I were sleeping in our second-floor room at night when we heard a "tap, tap" sound from outside. It sounded like someone was throwing small pebbles at the window. I woke up at that point and thought, "What is that...?" but by the time I realized it, there was a presence of "something" already in the room. "Something" was circling around us while we were lying there. I couldn't open my eyes, but I could feel its presence. My sister seemed to have noticed it too, and we were both terrified. Then, before we knew it, morning came... and "something" was gone... It might be a common story, but I was so excited because someone close to me had this experience! lol By the way, this only happened once. Thanks for listening.