I don't understand her sudden illness initially over the situation. There's no talk about thinking someone was pulling a prank on her at work when she arrived? Wouldn't she be confused, asking people or trying to figure out - at least initially rather than just looking at names and directories and running off ill?
She contradicts herself in the story when she begins to write, she explains that she woke up on the same day and year that she went to bed in (maybe she went to bed at 1am?), then she describes again 2 paragraphs from that how her situation began and that she paid no attention to the time. She does not describe how she realized she was on the same day that she went to bed on? Then further into her story, she describes looking on the internet, expecting the time to be different, but the date was as it should be?
Clues about the mindset sprout out when she writes "In fact, if this is a dream, then you’re all in a dream, because what I’m writing about doesn’t exist. So if someone replies, it means that they are experiencing the same reality as I am, whether it’s a dream or not." Her fact is not a fact, although the second part of what she writes may be the fact - "because what I'm writing about doesn't exist".
Again she contradicts herself where in the beginning, she writes she woke but the bed linens were different. Later in the story she describes how she woke to having nothing in the apartment change, everything was the same. She did not mention the strangeness of only her bed linens changing, she writes nothing was changed and everything was the same in the entire apartment.
Later she writes, "...people with a grasp on “the truth” can refrain from commenting". Why would she not want the people commenting on the truth? I can understand not wanting pranksters, but 'the truth'? She doesn't want the truth of her situation?
Why would she go to a social security doctor, why not a family physician? Did she go to be tested specifically for drugs and alcohol or did he test her because she described not remembering? Why is there no discussion of further medical testing, like looking for brain tumors, or other medical problems besides drugs and alcohol that could be having her thinking this way?
I find it strange that her work place would change floors within a five month period, but nothing else in the world changed - just her bed linens, some clothing in her closet, her boyfriend, and her parents memories? It really appears her story is full of holes and that she's having some sort of memory lapse and hallucinations of small trivial things and two major areas of her own life - work and a boyfriend. If she jumped between dimensions and two major areas were different, it seems there would be other major differences in other areas of the world or with people, not just with her and her situation (if that's how parallel universes exist). From the story she tells, I would definitely have to believe until further investigation, questioning, and medical testing that she had some sort of brain mishap, personal memory lapse, that can be medically and scientifically explained.