Спільний звук

I woke up at 3:12 a.m. to the sound of my phone buzzing. Half asleep, I grabbed it and saw a text from an unknown number. “Don’t look behind you.” I laughed a little. Probably a wrong number. Then another message came. “I’m in your house.” Now I was fully awake. My room was completely dark, except for the glow of my phone. My door was slightly open, just like I left it. I told myself it was fake. A prank. Then my phone buzzed again. “I can see you reading this.” My heart started pound