I wrote an article about my experiences with both depersonalization and derealization a while back on my blog. Though I have experienced dissociative amnesia, more often I didn't. My experiences ranged from feeling I was in some kind of different realm, out of body experiences, visual and auditory distortions, completely ungrounded, and even having dissociative hallucinations.
I eventually figured out what some of my triggers were and began to use grounding techniques to prevent the dissociative experiences. They really helped. I have not experienced dissociation in a long time.
If interested in my blog post, find it below. It also includes grounding techniques that have been very helpful for me.
https://birdflight.blog/2017/03/06/d...-prevent-them/