I am trying to remember a specific story that I read in an issue of Analog Magazine over a decade ago.
The story was about a character in an apartment (most likely on Earth), rather than on a space ship or anything of that nature. He somehow finds himself (or-herself?) in contact with either a past (or future / or alternate reality) version of themselves and rocks the foundation of their being by some revelation.
I can't recall if there is an actual physical meeting of the two versions, or if there is a note or other sort of communication left for them.
I know this is very vague. I can't recall the details and some of what I think I remember is most likely incorrect!
The only information I know absolutely for certain is that it was published in Analog Magazine between 1996 and 2003.