The answer to that question is usually some form of fear and it often shows up as the need to control. Some part of us knows we really can't control all outcomes, but we like to think we can at least try! The truth is the more we can let go and listen to our inner guidance system the more peace we will experience in the process and the "answers" can come to us as we are now peaceful enough to hear them.
"But I can't let go! It keeps whirling around in my head no matter what I do!" Then let it whirl and focus your attention on the next thing in front of you. The answers will come, they always do.