has second thoughts

• hesitatesShows momentary indecision
• waversFails to decide
• reconsidersReviews a prior decision
• doubtsFeelings of uncertainty
• regretsSorrows over past actions

backtracks · pauses · rethinks · vacillates · waffles · flip-flops · cold feet · uncertainty · reverses · balks · falters · retreats · qualms · misgivings · remorse · indecision · buyer's remorse · chickens out