Mimics are an actual thing. I used to hear a mimic of my ex in his house. He lived alone. Another friend of mine went through a similar experience but he didn't live alone he was just in the house during the day because he worked at night so the other two guys were at work during the day. So when he was there he was alone basically. Mimics scare the crap out of me. Ugh. If I had to deal with this idk what I'd do probably my best the same as you are.