I have had derealization for years and its never felt like this. I think I'm having a bad reaction to lexapro. I've been on in about 4 months so maybe it's just now starting to do something? Am I losing my mind? I'm lying here on the couch so scared and my boyfriend keeps telling me I'm not dying and I'm fine and he just went upstairs to sleep. I don't believe him because he doesn't feel what I'm feeling. This has been going on for hours and hours. When I sleep I have horrible nightmares so I don't want to fall asleep