Premanand Maharaj Ji
Why do I keep imagining the worst and how do I stop it?
Replace negative thoughts with thoughts of Bhagwan
Worry grows from imagining 'what if it goes wrong', and most such thinking is negative. Keep Bhagwan with you and the thinking turns positive, so you are not troubled.
If we think of Bhagwan, the thinking turns positive at once. Bhagwan will help us pass, and even if we fail, Bhagwan will find another way.