this may be a late reply, but when i was first diagnosed wit graves disease three years ago, one of my major symptoms was depersonalization so you are definitely NOT alone. at first, i thought maybe it was my mind going away from me because ofall the anxiety i was feeling but i definitely felt it all the time. especially when i would look in a mirror, i felt outside myself. i would avoid looking at my hands and arms because i felt like they werent mine. when i was headed towards remission, the feelings faded. i did see a therapist though because i felt like no one could understand how i felt. many people dont know what depersonalization is and when you explain it to them they just look at you like your crazy but i definitely know what it felt like and i hated it so much. i hope youre better now!