Edit: not deceased, tentatively everything feels fine. [snip snop], because I sure feel silly. As expected, there was nobody in my apartment, I woke up just fine (if sleep deprived), and the floor area outside my bedroom takes like ten seconds to survey and it was all clear. Some of those creaks were suspicious, but I'm also not paying attention to ambient house sounds most of the time, and also there is a guy living directly below me who owns a massive, boisterous dog. So on the one hand, that was silly. On the other hand, less silly than some other anxiety spirals I've had.
