-까 싶다

The Korean grammar pattern ~ㄹ/을까 싶다 is used to express uncertainty or concern about a future event, as well as to indicate a tentative intention or plan. It can be translated to I'm worried that... or I'm thinking of... depending on the context.
Usage

• Expressing Worry or Concern: When you are worried that something might happen, this form is similar to ~ㄹ/을까 봐, but often appears at the end of a statement.
• Indicating Tentative Intentions: When you are thinking about doing something but have not decided yet, this form is used similarly to ~고 싶다 but with less certainty.

Examples:

• 이 선물은 좋아하시지 않을 까 싶었어요. / I wondered if you would like this gift
• 모두에게 알려줄까 싶어서 문자를 보냈어요. / I thought I'd text everyone to let them know.