Well, I've never mentioned that part before about the dark figure, but you're the first person I know of who's also had that experience, so I'm glad to find someone else who understands.
I hope you find some relief soon with your appt. There are a variety of ways to treat PTSD these days, and not all are medication, but it's a good first step to relieve the constant anxiety and difficulty falling asleep.

Feel better soon.