One of the most jolting days of adulthood comes the first time you run out of toilet paper. Toilet paper, up until this point, always just existed. And now it's a finite resource, constantly in danger of extinction, that must be carefully tracked and monitored, like pandas?
Like heartbreak, these unpredictable crises are not something you should live in fear of. Perpetual fear won't protect you. Fear is not a citronella candle; scary life happenings are not mosquitoes. They happen in ways we can't predict, control or understand. The only guaranteed outcome of feeling scared all the time is that you will feel scared all the time.