Is there a name for this particular anxiety?

Just answered another question and it got me thinking.

Question: What are you paranoid about?
Answer: Not paranoia exactly. But I once had a panic attack when I thought about the amount of Earth that will likely never see sunlight again.

Strangely enough, I found out this runs in the family. Apparently I had a great aunt who went crazy one day and decided to tear up all the tiles in the house—with her very bloody bare hands.

So, is there a name for this craziness?
You know, something more legit than covered-up-Earth-a-phobia…