I dream alot, and can generally recall 2 - 4 dreams from any given night and always have. I can recall some nightmares, but alot of the time when (according to husband) been thrashing & screaming, well that's when I can't recall any dream at all, so I'm no expert but perhaps if too traumatic you don't remember your dreams?

Have you gone to get a physical? It may be worth testing for your electrolytes & vitamin levels, this can affect quality of sleep, energy levels etc. My stuff was a bit out a whack & so I'm using supplements.

I also have a friend who does not dream, and he does not have PTSD. Yet, and I'm not sure if this is reliable you might have to google it - but I always believed that everyone does indeed dream every night, but not everyone recalls the dream. There are techniques that can assist apparently, but whether you want to do that or not?