cross a bridge before one comes to it

cross a bridge before one comes to it (third-person singular simple present crosses a bridge before one comes to it, present participle crossing a bridge before one comes to it, simple past and past participle crossed a bridge before one came to it)

1. To worry about a future situation despite being as yet unable to act on it.

• cross a bridge when one comes to it

• sufficient unto the day is the evil thereof
• don't count your chickens before they're hatched