Catastrophic thinking isn't my usual, but I've had it, as well as other forms of dysfunctional thinking. [Yea, "dysfunctional thinking" is an unpleasant term, but that's how CBT calls it.] I guess my most common catastrophic thoughts are health-related. In the past, I had myself thinking I had MS, cancer, heart problems, you name it. To date, I've been wrong about them.

Like Merlin, I also found CBT the best therapy for dysfunctional thinking. A past psychologist of mine really focused on it. One of the most helpful tools was a Dysfunctional Thought Record that helps challenge such thinking. A great article on this is at:

Putting Your Thoughts on Trial: How to Use CBT Thought Records | International Bipolar Foundation

I hope you get some better sleep again soon.