I feel stupid

As a kid, I found a video on YouTube called "One Lived a King" ("Był sobie Król"). But instead of some cool legend or fairy tale, it was just a creepy as fuck song about three people being brutally eaten by animals, with a WWII intro for some reason.

I watched it when I was around 5 years old. Now I'm 18, and I recently found out that this was based on a children's lullaby.

I HAD NIGHTMARES FOR MONTHS. I WAS SCARED TO GO TO THE TOILET AT NIGHT. I WAS TOO SCARED TO SLEEP. ALL BECAUSE OF A FUCKING LULLABY.