Damn this is literally what I often dream about for more than a decade now. Some story happens, eventually I am about to get killed or die and teleport myself back in time to change the outcome, only to realize that I didn't just jump back in time but also in a slightly different world. Sometimes I only notice it days later, when I look at a map and realise that the borders of a country are different from the ones the real world/my original world has.
Maybe the director dreams of the same shit. I dream it almost every night.