I think that's the way we are, we are smart creatures, the smartest animals on the planet, why? Because we know how to feel, love, experience different emotions and fear is one of the emotions, it's normal to feel stupid, exhausted, a person who is afraid of something, we are all people and everyone has fear, I haven't met anything that would change my opinion yet.
Yes, you need to treat life easier, stop worrying and thinking about trifles, do something not to think about it.
First we take out our brains, then we laugh at ourselves, - "how could I be afraid of this?", "how did this situation make me worry?".