PTSD,
I have experienced this too. It was/is surreal. I woke up one day and it was like someone opened a window. Things are still terrible but at least I am here. I never thought of it as anything but major depression.

The first thing I did when I realized how much I missed was to call some of my friends whose numbers were programmed into my phone. They all rejected me. I hate it when anyone say (especially my kids) say "do you remember...?" because I don't.

I don't have any advice, but I wanted to tell you that you are not alone