I don't know if I'd call it recurring, since it's pretty rare, but: Sometimes I lose my mind in my dreams. I can feel myself losing my grip on my faculties, as if something were ripping my mind apart. It's hard to describe, visuals become distorted, things split apart into colours, my grip on reality feels slippery. I imagine having a stroke might feel that way, although I hope it's less dramatic. This is just sheer terror.

Also rare, but in a similar vein, sometimes I wake up into a dream, over and over again. I'll be in bed, relieved I'm finally awake, until I soon realize I'm still asleep and wake up again. When this repeats enough times, it becomes pretty desperate.

Otherwise, I rarely have anxiety-inducing dreams.