There is a school of thought that holds that there is an infinite number of other worlds existing side by side with our own.
Perhaps we are constantly shifting between different worlds without even realising it.
The lady continues by saying that the events that followed proved to her that what she had seen was no dream.
This lady thinks she originated in another realm as well. An ending in which she perished.
Since they were identical to the ones that occurred before she "died n the other timeline.
It all started when she received a text from a friend she was going to a party with later, when her younger brother walked into her room to beg her for a ride.