Maybe it was just an insect? The thought made her chuckle again, but deep down, the mystery of the noise lingered, refusing to let her sleep easily. At one point, she even began making up silly lyrics to imaginary songs, mumbling them softly to drown out the eerie noise.
“It’s just the wind,” she whispered to herself. “Or maybe it’s a ghost haunting me for some reason?” She chuckled at her own ridiculous thoughts, but the tightness in her chest wouldn’t go away.