some of those symptoms definitely could be depersonalization or derealization that is caused from anxiety and/or even a medication maybe.

i have had the experience where it feels like my hands are unusually large which for me was a symptom of dissociation likely at that time more related to sleep deprivation..i have a lot of variations of dissociative symptoms in general though, some that are not 'documented' under dissociative disorders in the DSM because it would be hard to actually have every dissociative experience a person has had listed since it can differ even though there are some more common ones.

i would suggest trying grounding techniques (can google those) for anxiety, etc. as if it is anxiety that is causing it, it could help calm you down before it gets to that point.