Noises outside the walls

My parents went to visit my aunt outside the city. They said they'd come over in the evening, but they called and said they were staying overnight. I was happy to finally be home alone and be the eldest... I made myself dinner, poured myself some hot tea, and went on Instagram, chatting with friends for almost three and a half hours. I looked at the clock, and it was 11:30. I didn't want to sleep, so I went into the living room, turned on the TV, and suddenly I heard a knock. I ignored it, but the knocking repeated itself... I was just scared (knock) (knock) and thought, "Oh, forget his imagination," and then someone scratched my fingernail. I listened closely, and it was those sounds coming from outside the walls. We don't have neighbors to think about, and normal people sleep at midnight. And then I hear again (knock) (knock) and scratching with nails, I got seriously scared, turned off the TV, closed my eyes under the blanket. And then behind the wall a hoarse and female voice says "I SEE YOU" (knock) (knock) .. And scratching again "I SEE YOU" (knock) (knock) ... Almost crying, I took the cell phone, called mom and dad and told them to quickly come, mom asked what happened, and again the voice "I SEE YOU" and knocking. Mom began to calm me down .. She said that they were on their way right away, turned off the cell phone, closed her eyes. I don’t remember how I fell asleep, got up at 7 in the morning, my parents were already home. They said that when they arrived, I was sleeping. They asked what happened to me yesterday, I said that I didn’t remember and that I had a bad dream. Nothing else like that happened, but now I sleep with my parents, I’m scared alone...