1. The opening sentence is a bit of a run-on. I'd recommend breaking it up to add a little more punch it up and not start with a grammatical error. Something like "Jan awoke slowly, the dream still there. A city of towers and exotic palaces. Getting out of bed, ..." would punch it up a little and start the piece on the right foot.

2. Removing unnecessary words can give you the space to fit even more narrative into these short pieces. Unless it's integral to telling us something about the character or provides important information about the scene being played out, adjectives like "gradually" can often be cut. "Getting out of bed, she began her normal routine" gets the same point across with one less word, which is one more word that can be applied elsewhere! Similarly, the actual definition of deja vu is "a feeling of having already experienced the present situation" so "the deja vu feeling haunting her" is a bit redundant when "the deja vu haunting her" communicates the same thing without the repetition.

3. I'd recommend varying some of the language choices that show up in short succession. When "unable to shake the strange visions" is immediately followed by another sentence that uses the phrase "an attempt to shake off the deja vu", that second use of "shake" can make the piece feel more limited and constrained than it actually is because the vocabulary repeats itself.