I can play a song on my cello but I don't know where I heard it from. I made my dad, mom, sister, and 3 of my friends hear it but only my dad, 2 of my friends and my sister heard it before. The problem is, none of them know where it comes from. My friend who knew it says it might be from one of our concerts. I know it wasn't. My other friend, she doesn't play an instrument, won't say anything about it when I ask her about it. My sister and dad say they don't know. I don't know either. There are no lyrics. At least I think it doesn't have lyrics. It is a creepy, sad song and it's short. I can't search it on YouTube because I don't know what to search for! I don't know how to figure out what the song is. Can someone help me find the name for this mystery song?

Have you played (or hummed) it for a music teacher?