Continually telling yourself that you don’t know, only reinforces the idea that you don’t know and blocks you from discovering the answer.
Don’t focus on the problem or your lack of solutions to the problem. Turn your attention to something positive and trust that the solution will come in due time.
We tend to search for answers in our mind— replaying the same thoughts over and over again. But the answers often come after we stop searching for them. Give it some time and see if the answer reveals itself.