Oh my gosh, I am sorry to hear whenever someone else suffers this.

My anxiety is connected to catastrophic thinking but some of the strategies and coping mechanisms I have in my 'toolbox' help anxiety regardless.

I have several very helpful worksheets from my CBT training. The one that is most helpful you may be able to find by googling "Decatastrophic Thinking Worksheet". Another thing I do is make a for/against list on paper. This is NOT a pros and cons list rather a list of 'to what advantage does thinking this way help me' vs 'to what disadvantage does thinking this way produce'.

I used to walk around with a worry stone. I have no need to do so any longer as I know the stone so well I merely have to imagine it.

When I am at home and anxious I will use 'weight therapy'. There is no need to get yourself a weighted blanket. Heavy bean bag on your shoulder does wonders. It give us the same sense of comfort you get from being hugged and is very calming. I made my own out of a long tube sock and big bag of lentils.

When I am out in public. You may have heard of the '5 senses' It is a way of practising mindfulness. Find 5 things to see and consider everything you see about them. What 5 things do you hear and pay attention to them. Is there anything you can smell. And what 5 things do you feel? The fifth is harder, it is taste but sometimes you are in a place or situation (ie at a coffee shop) where taste is relevant too.

Welcome aboard by the way