When I was younger, I had recurring nightmares of one particular place; it was kind of a big gothic castle-type house (mansion, something like that) in an outwardly nice grassy and wooded area. I could actually realize when I was there just from the landscape, even before I was near enough the building to see it.
Once I arrived at the building, the outside was just sort of creepy but ultimately harmless, but for some reason my task each time I had this dream was to get into the house, and start to go lower and more and more through locked or private areas of the castle into the darker basement and sub-basement, until it was almost like air ventilation ducts made of stone that I was squeezing through. The lower sections were dark and haunted with some kind of severe evil presence that sometimes I would run into or get near to.
It maybe isn't coming across as all that sinister just typing it out, but it was fuckin freaky being in the abandoned haunted basement area.
Have you ever had sleep paralysis? The combo of severe evil presence and severely constricting environment/feeling at often tied with sleep paralysis and have some correlation with dyspnea in real life while you're dreaming
No, nothing like that. I definitely had a whole class of nightmares that was the "severe evil presence" variety, but usually I would be fighting it, or like with some kind of capability, not just pure helpless terror about the sinister presence of it.