This happens to me when I'm facing a traumatic experience such as death, christmas, talking to people. It feels like I'm watching myself and things seem surreal to me. it happens when I get really nervous too. Especially at christmas, I just feel weird about it. Like it's not actually happening. It's difficult to explain. Plus when I look at myself, I don't really see the person I'm suppose to be. It's like looking at a different person.