A lot of what you described above sounds really familiar. Especially the loss of memory! To me, a lot of the time when I dissociate, I feel extremely numb. I don't always realize it's happening until it's over. I sometimes have memory loss during the time, but sometimes I remember perfectly too.

I've read a lot of people feel out of body, but I've never experienced that myself. I think the emptiness in your eyes you described is really common too. I think that's a huge sign that it's happening.