Just a semantic adjustment: you may feel completely ?gone? but I urge a reorientation about your word choice.
Instead, what you are is ?completely Disconnected? from self. If we keep telling ourselves that we are ?nearly gone? or ?totally gone? etc. we are adding confusion to the hell. When we then ?come back? the entire experience feels surreal ? how can a self vanish and then reappear?!? It fuels more self-obsessing and more belief that we should DO something to keep self intact. It never vanished. What happened was a total disconnect of Experiencing self from Observing Self.
Feeling alive and cognitively intact (observing self) yet without the EXPERIENCE of feeling like oneself is a form of absolute hell. It is like being buried alive. It is like existing in a shell without a soul. It is like?.well, it is DP.
And there are levels to it. Sometimes we feel ?it is as if my self is vanishing!?
Other times we feel ?My self IS vanishing?
And still other times when we feel
?I?m totally not here. I am gone. My Self has been erased?? and we?re petrified.
But nothing is Gone.
Instead, it is a total Loss of self-relatedness. Total break with the sense of self-experience. Total lack of connection between Observer and Experiencer.
All you need to do is survive it. And self will be right there, totally intact.