Is this depersonalization or not? This literally came from nowhere and I need some possible solutions.

I really don't know how to explain this. I feel as if my identity was completely messed with and my mind is being replaced by someone else's mind and thinking. This all happened out of nowhere suddenly. My head constantly feels like it is bloated with water or some intense brain fog. I feel so weird and dizzy at times. When I walk, I can't even concentrate well. I can't have a point of focus. I can't feel the regular emotions and euphoria that I feel from watching things that I enjoy and the natural flow doesn't go through. I have a hard time remembering the past well and it's like it doesn't feel like it happened at all. I feel distant from it. I feel like my identity and personality was removed from me or has been disminished to a subtle level. This feels very similar to how an ego death feels like. I can remember factual things such as my name and nationality but when it comes to my personality, likes, dislikes, beliefs , etc, I feel like they are completely distant and detached from me. It is very hard to actually act like myself.

I can't act the way that I used to act and reason the way that I used to reason. This feeling sucks so bad and I hate it. I also believe very strongly that what happened to me is some form of identity fragmentation and that sucks. I went to the doctor and bloodwork and they found nothing too unusual. The same situation with my neurologist as well. The neurologist said that my brain is okay. I don't know what has happened to me but I hate it badly. It's not comfortable and I need to return to my old self again. I struggle to learn new things and I struggle to remember people and how I felt in the past. I struggle to think. I can't even discern thoughts in my head. I can't discern which one is intrusive, my real thoughts, evil thoughts and thoughts that I shouldn't be doing. I don't feel like my old self at all. I feel so completely abstract and empty inside. I feel like my personality is diminished and weakened. I also have a very low sex drive/low libido. Yesterday when I was walking back home, I felt so dizzy and confused. I was walking outside in the night and everything around me felt dizzy. I felt this intense brain fog.I am struggling so hard to even remember what I felt like.

I didn't take any drugs, nor had any physical trauma or had any anxiety. I was thinking about my past intensely and felt sad but I woke up the next day out of nowhere and had these symptoms. It sounds weird as hell.

I really do feel like I am going through something called identity fragmentation but I don't know how this started. I don't know exactly how all of this started. It happened one day and it has been ongoing since. My head doesn't feel clear and it feels like a high. I don't think the same or feel the same. I can watch a whole movie and not be able to feel the same emotions like I used to but I would feel like some blob or dizziness in the head the whole time. Can someone please explain what is this?