have second thoughts

I'm having **second thoughts** about buying such an expensive car.

Idiom Doubt and Uncertainty

Meaning

to start having doubts about a decision you have made

I'm having second thoughts about buying such an expensive car.

An idea or opinion produced by thinking, or occurring suddenly in the mind.

to possess, own, or hold

a unit of time equal to one sixtieth of a minute; also the position after first

to not worry about something until it happens

to make a process run more smoothly by helping it along or making it easier

to take responsibility for leading and carrying the burden for a group

to learn or become skilled at something new

To face a final and decisive defeat.

to fail completely; to come to nothing