The What If game is one that no one wins. No matter what scenario you come up with, you can just flip it to its opposite.
What if I run out of money? What if you don't?
What if I get hurt? What if you don't?
What if... doesn't work? What if it does?
You can go round and round forever doing that. The only way to escape it is to refuse to play the game. As Jessica said, it is good to plan ahead. But most of what we worry about never happens.
If you worry, you will die.
If you don't worry, you will die.
So why worry?
Focus on something you enjoy doing and change your thoughts.