Yogi: The mind was thinking about a problem from home and I became anxious and was coming up with solutions. When awareness came in, the thinking and anxiety would go away. But this popped up repeatedly during the sitting and walking; and it was tiresome. 

Sayadaw: No object bothers the mind – it is because you’re getting lost in thought. You’re aware of the initial arising of the thought and you’re supposed to use that moment to start watching the thinking and feeling, and not get lost in the story.

Be less interested in the problem and more interested in the process at work – why is the mind thinking about this and how it is feeling when it is thinking about this, and the interaction between thinking and feeling.