It sounds like maybe you feel very disconnected from yourself? This can indeed be very upsetting and worrying, I know.
Can you tell us some more about what you think and feel when you look in the mirror? Then we can help you some more.
do you mean you don't know yourself anymore? or do you mean you actually feel you're not the person in the mirror? the latter i've felt as a form of dissociation. it might be worth mentioning to a doctor. but you're definitely not alone. feel free to pm me if you need to talk.
bad times
