have second thoughts

US /hæv ˌsek.ənd ˈθɑːts/
UK /hæv ˌsek.ənd ˈθɑːts/
"have second thoughts" picture
1.

to change your mind about something, or to start to doubt a decision you have made

:
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I was going to buy that car, but I'm starting to have second thoughts.
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She agreed to the plan, but later she had second thoughts.
:
reconsiderwaverhesitatehave misgivingsthink twice
:
on second thoughtthoughtthoughtfulsecondthought-provokingperish the thoughtfood for thought