Freaky Weird Moment

So I just had the freakiest moment EVER!! I'm in bed with just the bedside lamp on and I'm rolled over on my side facing the wall with my eyes close listening to music before bed and suddenly there's like shadow movement. And you know what I'm talking about when I say that you can tell when there's a light being turn on and off or there's light and suddenly there's not when you have your eyes closed. I honestly thought my mom opened my door and flickered the over head light...I'm slightly freaked out at the moment.....O____o;;;; no ghosties in my room PLEASE??