Maybe stress has already started knocking on the door. Here is a technique I recently learned about to re-wiring your thought patterns:
When you are feeling stressed, imagine that your mind is like a snow globe that has been shaken. The “snow” is whizzing around like a massive huge snowstorm.
Now stop the storm, imagine the “snow” starting to settle on the bottom and be still.
Once the “snow” has reached the bottom, your head will be clear like the water in the snow globe.
This has worked for me, hope it can help you too.