Yes, it will absolutely stop and you will feel totally real again.
The whole experience is fueled by anxiety. It will stop when it's no longer fed by your obsessive fear.
It's not really about the content of the ruminations. You could be afraid of literally anything, like getting the thought of a pink elephant permanently stuck in your mind. It's not going to happen, and it's not any more likely to happen with existential fears. Lasting changes take a lot of work.
The first time you suffer something like this, you fear that there might not be an end to it and cling desperately to hope.
The experience is transformed the next time (if there is one), and the edge is taken off it, because you know you will come through on the other side.
So remember the moments from your day (however fleeting) when you stopped ruminating and felt a little more comfortable, and that will strengthen your hope and reduce your anxiety.
These moments will tend to occupy more and more of your day, until soon you completely forget all about those tedious and tiresome things which you have contemplated ten thousand times already and they completely evaporate from your awareness.
You might find some of my recent posts relevant, such as the following:
http://www.dpselfhelp.com/forum/index.php?/topic/85849-fully-recovered-from-severe-dpdr-only-here-to-help/
http://www.dpselfhelp.com/forum/index.php?/topic/85881-please-help-my-mind-come-to-a-conclusion/?p=564441
The whole experience is fueled by anxiety. It will stop when it's no longer fed by your obsessive fear.
It's not really about the content of the ruminations. You could be afraid of literally anything, like getting the thought of a pink elephant permanently stuck in your mind. It's not going to happen, and it's not any more likely to happen with existential fears. Lasting changes take a lot of work.
The first time you suffer something like this, you fear that there might not be an end to it and cling desperately to hope.
The experience is transformed the next time (if there is one), and the edge is taken off it, because you know you will come through on the other side.
So remember the moments from your day (however fleeting) when you stopped ruminating and felt a little more comfortable, and that will strengthen your hope and reduce your anxiety.
These moments will tend to occupy more and more of your day, until soon you completely forget all about those tedious and tiresome things which you have contemplated ten thousand times already and they completely evaporate from your awareness.
You might find some of my recent posts relevant, such as the following:
http://www.dpselfhelp.com/forum/index.php?/topic/85849-fully-recovered-from-severe-dpdr-only-here-to-help/
http://www.dpselfhelp.com/forum/index.php?/topic/85881-please-help-my-mind-come-to-a-conclusion/?p=564441