Inside Your Head
There are hypothetical situations and then there are hyperthetical situations.
It's reasonable to consider that first group, to spend a few moments when prudent to plan for some potential, realistic "what if?" scenarios.
But ignore that second group. Your mind can run wild escalating scenarios that are absolutely unlikely to occur. Worrying about those situations can take valuable time away from hypotheticals and reality.
Dream, but don't let dreams distract you. Worry, but don't let worry master you.