I don't really dwell on negative thoughts, but I always think about reasons why, what, how, when and so on.
After that analysis and conclusions I just move on :)

About being flexible, I'm always laughing how everything interconnects when you look at the big picture.

“You must be shapeless, formless, like water. When you pour water in a cup, it becomes the cup. When you pour water in a bottle, it becomes the bottle. When you pour water in a teapot, it becomes the teapot. Water can drip and it can crash. Become like water my friend."

Bruce Lee said that, not exactly a psychologist. I think it fits quite well here.

Have a nice week Abi! :)