Anxious racing thoughts is like having everything that could ever go wrong run through your mind at the same time. At least for me. It mostly starts with one worrying/scary thought, which leads to another, which leads to one more and so on. Before I know it I start worrying and getting scared about everything, to the point where most of the anxious thoughts don’t even make sense. They just keep running through my mind and often enough I start crying because it’s just unbearable. Sometimes I can break out of it by repeating a mantra of mine in my head, sometimes I have to wait until they just go away.
I don’t know what it’s like for others, but that’s how it is for me.