Hi ChangingMyMind, my experience of depersonalization/derealization is quite similar to what you've described. Feeling detached from my body, having no sense of where my limbs are physically even though I can see them where they are supposed to be, feeling like I'm floating up and backwards from my body, not recognizing myself in the mirror, etc. For derealization I can relate to your feeling of unfamiliarity in a place that is usually familiar. Often it's like my surroundings become like I'm watching a movie, and it can look distorted. Definitely can relate to lots of what you said!