I'm sorry you're dealing with this. It's just...just awful.

Do you have a mantra that calms you down? A saying? A prayer? Favorite amendment to the constitution? I know that sounds kind of lame, but it's helped me.

I think C-span is good for re-orienting yourself in the present--day, year, name of the president, etc. It's so mind-numbingly boring (at least for me) that it's somehow reassuring. And I almost never find any of the content upsetting (unlike news networks).

If I'm having derealization along with it, I go outside and dig a hole. The world can't be a sound stage if there's more than a few inches of dirt.

I hope you find something that brings you relief.