Don’t cross the bridge untill you come to it.
Deal with a situation when it happens and not unnecessarily worry about it in advance.
Example: I know you’re worried about the mortgage payment due in January, but don’t cross the bridge untill you come to it.
Phrasal verb:ease up on
Ease up on | To become less strict about something When I was younger, my mom didn’t let me see my friends on weeknights, but she’s eased up on her rules lately. |