Just try to remember that derealization is a coping mechanism - it's a psychological survival mechanism. When I experienced this for weeks or months after the injury I sustained, it didn't bother me because I didn't even realize it was happening. I was kind of "la-di-da", "I'm going to be better someday"... I think it didn't bother me as much because I tend to be a very optimistic person... so that's kind of where I was. I didn't realize the severity of the situation for too long.