Dissociation is the body's way of protecting you in response to overwhelming emotions/circumstances. There's depersonalization and derealization, separation from yourself/separation from the world, people around you. But I find that they blur together tbh.
I can't speak for you, but anxiety can make me feel dizzy. Dissociation also creates an interesting feeling for me that's sort of like dizziness but not quite. It's like a weird somehow spiny floating feeling, but different from just being lightheaded.
In terms of dissociation… I notice that my brain fog gets worse. It's like there's a fuzzy feeling in the front of my head sometimes, the back of my head other times. Sometimes it's almost like I'm literally in the back of my brain. I feel even more detached from the world around me, things feel fake and off. Jamais vu is a familiar feeling. I've been totally unable to feel my body, like my body just isn't physically there. Sometimes things literally look farther away (especially people's faces, it makes it difficult to look at people anymore), sometimes my vision feels grey, sometimes things just look kinda fuzzy. My focus gets weird. Rarely, things get wavy, sounds are muffled or sound too far away, or it's like the world slows down a bit.
And of course if it gets really bad my body basically enters freeze mode, can't think or move or speak. Feel like I'm either above or behind myself. Just totally numb. I feel like my eyes are dead/glazed over too, once I managed to look in the mirror when it was getting bad and it kinda looked that way. Idk. But that level of dissociation wears me out so much that I need to sleep after it starts wearing off.
I think my dissociation started because of trauma. Anxiety probably came from trauma too, which made it worse. Depression got especially bad and just never stopped being bad. That makes it worse too.
So yeah, fun stuff. I know I missed some details but oh well. Sorry for taking so long to get back to you, man. Hugs