Ah man. I have DID (DPDR on crack) and infinite nonexistence triggered the hell out of us.

I don't know why but after we "grieved" it, it started to sound really, really tempting.

What's helping us is Zen Buddhist teachings. Nothing belongs to us. The earth was here before us. I also ask myself "where was I one year before I was born?"

In addition to that, there are videos by Jordan Hardgrave on Youtube about overcoming DPDR. He has a course to get rid of it, but it's expensive. Diet, exercise, daily progressive muscle relaxation, restorative yoga all helped me overcome a literal lifetime at the bottom of the DPDR spectrum.

You should also look up grounding resources. Do the grounding skills over and over again daily even if they don't seem to be doing anything for you.

You'll come out of it. Good luck.