Scream
Years ago, my mother took a yoga class at the YWCA. Periodically, she would come home and teach me some move she had learned. The one I remember was a full on ugly face, tongue out scream that, I believe, was supposed to relieve tension.
It really works.
I'm irrationally afraid of rodents (particularly tiny, mice that squeak, scratch and thump in the wall. Worse? The dead squirrel on my mother’s front steps when we came home from a trip a few years ago. She wouldn't let me call my husband and ask him to drive 40 miles and over an hour to come take care of it (he would have). Noooooo, don't bother him, Danny. You can do it.
Note, she didn't say we can do it.
So, I started to scream. Immediately. Loudly. Ugly face (kept my tongue in my mouth though) as I got a shovel from the garage. I continued to scream as I inched the shovel under the rock hard creature (neither bleeding nor rotting so not sure how he ended up dead on her steps. My theory was electrocution.) I screamed still as I scooped it into a garbage bag. Which I put in two other bags before putting them in a can which I placed at the curb although garbage day was several days away.
Screaming is a great way to handle fear. And if you're luckier than I am, perhaps someone will come to the rescue so you don't have to deal with dead rodents personally.
Or perhaps you're afraid of insects. I had a student who loved all God's creatures as long as they were not crawling anywhere nearby. It was not unusual for her to suddenly scream with such terror my heart would stop for a moment before I took note of the wild eyes and finger pointing at the ground or the windowsill. The first time it happened, silly, heartless me thought I'd step on the poor creature which led to shriller more unhinged screaming. No!!! Don't kill it. So, I scooped it up with a piece a paper and walked it outside (our windows had screens) so that it could live...free to find its way back into my classroom.
Now, if you're a city dweller, as I was from birth through graduate school, you might find yourself afraid of being mugged. Since screaming after the fact isn't always possible or in your best interest, when I was in college, I took to singing as I walked across a bridge from school to my apartment at night. Loudly. Badly. The goal was to ensure people were more afraid of me than I was of them. People tend to keep a wide berth from crazy.
These are only three fears many people face but I have no doubt the full on ugly face tongue out scream could help you get over yours. But if not, try the loud singing. If nothing else it might distract you.