Did you ever read the book Dark Matter  by Blake Crouch? I loved most of it, but I hated the ending so much that I gave it a very low rating on Goodreads and still complain about it to this day. But that's not the point! The point is the concept of the multiverse, of alternate universes and lives and stories and versions of us. 
Maybe Matt Haig's The Midnight Library is a better example, in which a woman who tries to die by suicide first experiences all the other possible variations on her life, h...