have second thoughts

have second thoughts

To reconsider something; to begin to doubt a previous determination or commitment to something. Why are you hesitating? You're not having second thoughts, are you? A: "Where's the bride?" B: "I don't know. Maybe she had second thoughts." I was sure I had seen the rare bird, but now I'm having second thoughts.
See also: have, second, thought
Farlex Dictionary of Idioms.

have second ˈthoughts

change your opinion about something; have doubts about something: We were going to go to Italy, but we had second thoughts and came here instead.
See also: have, second, thought
Farlex Partner Idioms Dictionary
See also:
  • (do) (you) want to make something of it?
  • (I) wouldn't (do something) if I were you
  • a bird in hand
  • a bird in the hand
  • a/the feel of (something)
  • a straw will show which way the wind blows
  • a crack at (someone or something)
  • all right
  • (you) wanna make something of it?
  • a fast talker