If you can afford the time and money consider neurofeedback training. It can be very good at scientifically determining the likely source of your anxiety (e.g. too few alpha waves in certain parts of your brain) and gradually making adjustments.
Neurofeedback has helped reduce my level of anxiety.
The cognitive distortion is called "catastrophizing", I think.
I'm afraid of unexpected, strongly negative events occurring to me without warning. Nothing specific, just a generalized fear. That fear is crippling me. Worse, there's a part of me that feels that fear is keeping me safe. "If I let go of that fear," it goes, "I would start doing things and then I wouldn't be safe any more."
I haven't filled out a job application in over a week, because doing so would force me out into the world if i got an interview, and into the world consistently if I got the job.