Write about a character who discovers they have the ability to control time, but soon learns that every time they make a change in the past, it has unforeseen consequences in the present

Write about a character who discovers they have the ability to control time, but soon learns that every time they make a change in the past, it has unforeseen consequences in the present. As they try to navigate this new power, they must come to terms with the fact that they cannot undo the mistakes of the past and must learn to move forward in a world that is constantly changing.