I think that I'm still afraid of someone/something being there- I feel like something's watching me and there are lots of places for people to hide in my yard
Get a giant spotlight, headlamp, or flashlight. Get a heavy one if you want. Sometimes it feels nice to be able to have something in your hands that you could whack someone/something with if needed.
Don't entertain your fears.
What I mean by that: If you start to think that there might be
something lurking behind that trashcan or that trailer or something, go check it out.
An unknown fear is worse than a known one.
I've dealt with fear.
Actually, this same thing. My coop is a few hundred yards from the house, and I take the daily - and nightly - trek down to the coop and back. This time of year, it's dark both ways.
There was an incident that gave me a good reason to be jumpy, and to this day I still am a little fearful.
I agree with what a lot of people are saying. Hum, sing, be ridiculous. Find a silent mantra.
For me it was prayer.
I don't know if you are a religious person, but as a Christian, I believe that God is watching over you, BC. He can and has defeated fear.
These are some music videos that I really like, feel free to listen or not.

Fear is a Liar, by Zach Williams
No longer Slaves, by Bethel Music