I will be going about my day when I will suddenly have an unprompted flashback to a dream (just a snippet of the memory, lasting only a few seconds tops). This flashback will IMMEDIATELY be followed by a sinking cold sensation in my gut and chest and a feeling that is as if I suddenly am aware the world around me is not what it seems, like nothing is real and like I can’t feel my body. I have experienced these episodes (usually lasting 5-30 minutes) since I was around 11 years old. They were much more common when I was that age, and I had experienced somewhere around 15-20 episodes in the span of age 11-13. Around thirteen years of age these episodes seemed to have completely disappeared, but at around age 15 I started experiencing them again, only this time they felt more like premonitions, like deja vu. I would have a flashback to a dream depicting something specific, rather than just something nondescript (a common scene I would recall at age 11 was a tree in the forest covered in christmas lights. this thought wasn’t triggered by any outside stimulation). Today, I was having a conversation with a friend, and I watched a scene from a dream play out right in front of me. It was like in that moment my soul was knocked out of my body and I felt that sinking cold. She did her best to comfort me but I just kept hyperventilating because I could see my hands but I couldn’t feel them. My body was moving but it wasn’t me. These sensations started to go away after around 5 minutes of feeling like I was out of my body. Please, can someone tell me what I might be experiencing?