I dont know if this is the same thing but when I am doing something normal, my brain then takes me to a place of complete catastrophe...
It’s like impending doom, constantly.
E.g. I was holding my newborn niece in the conservatory. Lovely. Suddenly my brain reminded me I was wearing flip flops, on a tiled floor, with a cat at my feet.
I’d gone from newborn cuddles to tripping over a cat and smashing my niece through the conservatory window within the space of ten seconds. I had to give her to my sister and sit on the sofa holding her.
I do it almost daily. First time I was a passenger on a motorway (I live in the Channel Islands) there was a massive long lorry next to us.
My brain took me to the lorry sliding across from the back end, clipping the car and us rolling over down the hill and the car blowing up with us all trapped inside.
At work, if my manager goes in for a meeting with the director, I immediately think they are meeting about me and I’m getting sacked...
It’s tiring. And relentless.
Yes. I am being treated for anxiety. 
Buy yy to spiders too... I don’t trust creatures with that many eyes... 