You can't control everything. Some things in life are just out of your hands.
Certain events, other people's choices, etc... you can't control all of it. No matter how much you overthink the possible outcomes, life will still happen and other people will always be free to make their own choices.
What you do have control over is how you react in every situation. You have control over your actions and responses. You have control over the internal dialogue you have about the event or a person's choice.
I hope you eventually get to a place where you find peace in the chaos. Whatever it is you can't control, stop giving all of your thought. Take that weight off your shoulders and remember, some things are out of your control.