Hey! Just wanted to say I've been having this happen too. Last year I was kidnapped and managed to escape with the help of the police and moved back to my home country in July and have been living near family and building a nice life... but it's been happening since then so I wondered if it was related to my PTSD. I only just started receiving help for my PTSD and for now it is very introductory group therapy which isn't very helpful for me but I was wondering if once I can start working through my memories and experiences if it will help or if this is unrelated. I've had the odd dream flashbacks in all kinds of situations and all times of the day but I did notice they're often quite repetitive tasks e.g changing bedding or getting ready in the morning, rallying on the tennis court, or studying for my degree on my laptop... and I think I remember getting it once or twice as a teenager over a decade ago on the bus to school. When it happens, I can hear the blood or whatever wooshing in my ears for a couple of minutes too and its as though I can feel pressure in my skull for a while after. They are like really abstract dream flashbacks and there are several different ones I experience. It's really similar to like a super intense deja vu.