Is it normal that i heard a voice at night?

Yesterday, it was about half ten- eleven and I just turned my phone off so I could go to sleep. I was laying on my bed, facing the wall. I was scared, but I'm always scared because I have alot of fears like the sea, loud noises, paranormal, the dark, etc. I closed my eyes and tried to sleep when I heard a voice behind me say hello. It wasn't just a cheery normal hello, but it was a deep voice, humorous and scary, as if it knew it was scaring the daylights out of me. I lay there in that same place for which felt like 30 mins but was probably only 10. I finally started moving my fingers and head and stuff and eventually turned around. Nothing was there. I'm pretty sure it wasn't in my head, I felt like It was right beside me. I have a single bed so it wasn't on the bed. I asked my whole family and they said that it wasn't them. I believe in the paranormal and stuff so it really creeped me out. Plus a few days before, stuff started going missing after Id used it. Keys and a remote. If anybody has any idea what the earth it was, then please say. Thanks.