Got your attention, didn't I?

Okay, but really. Pretty regularly, I am overcome by this suffocating sensation that the world will one day end and none of what we're doing right now will matter. Then it just gets me into this spiral where I'm wondering if what I do matters even if the world doesn't end because I'm only one person. And everyone else is wanting to matter so do I even matter to the people who matter to me? And is there even any point in thinking about it? And....it goes on and it's endless and exhausting.

I've come to understand that this is a typical cycle for disordered people, so how do you overcome it (if you ever get to feeling this way)? It happens at least weekly, so I'd love strategies to stop the thoughts in their tracks if anyone has ideas.