the thing strange

I was about 16 years old and my parents, sister, made a trip to do some shopping in Caracas (Venezuela). We settled in a simple and basic looking hotel a hotel only to get to sleep.
It was about 6pm and my parents rested in the room but my sister and I decided to go for a walk around the hotel, at one point I decided to go down the elevator my sister stayed up sending messages from her cell phone.
When I enter the elevator it has a mirror and I decide to take a picture inside the elevator with my cell phone in front of the mirror.
I remember that I was alone in the elevator when I left there. I see how the photo looked. What was my surprise? When I look at the picture and zoom in on the screen, it looks something behind me.
Something very sinister has completely black eyes and the mouth stretched down the face white chalk and in the process something that covers his face something black, my skin bristles and my heart beat very fast.
That night I could not sleep thinking about what happened I would see the photo again and again looking for an explanation.

I deleted the photo because it made me nervous and I regret that I do not have proof now to show them but I remain in my memory and I drew a picture of what came out behind me in my selfie. It's more or less like that: