Something interesting. A Korean show involving time travel, the woman who went to change her past was told by the guide that when she returned to the future that time would return to the way it had been before she left.
“Your travels are futile!”
Pretty much one theory.
Since “you” exist as an unaltered remnant of the previous timeline, it could revert upon your return - if you could.
Who knows.
If it were possible, we might not know.