I coulda died y'all...

Okay so it's 9:something PM and I was outside in the dark walking the dog. It was too dark to see if she was doing her business so I turned on my phone's flashlight to watch her. And my finger slipped over the light at one point so I saw the shadow of my finger move across the ground and I legit thought someone was behind me so I like ran forward while turning around only to see nobody and I felt so stupid. Heart beat a mile a minute. What would I have done if there was someone there? I have no fighting skill whatsoever. I coulda died