Wow, such a great concept and how artistically it was showed off. The ending really gave me chills, especially at the last line, as it connected itself to the earlier expressed paranioa.
Read the story now
I think you nailed it down how an alone getting older woman can live in paranoia, and may i say fear of death, as it will be "nothingness", and there will be none will remember you again as you become a part of nothingness.
The symbolism was very cunning, I believe, too. As the death can't catch me unawares because I always sleep facing at the door...?
The writing was very crafty, I especially enjoyed the curt descpritions, well-expressed the curtness of the concept, but my favorite for a reason was how you described the sunlight "friendly" after the oppresive whiteness, because I could easily imagine it in that way, and feel its warmth as well.
Brilliant piece! Thanks for sharing.