For the sake of this thread, I will reveal my "hidden dreams" about my abusers. They are my sisters in real life - 2 of them, the youngest in the brood. They have abused my parents of money and opportunities that I really hated them until now. By the way, I live in the Philippines while my 2 evil sisters are residing in the US since 2007. Sometimes I dream of them but always in a bad way that they are villains and never did I dream of them in a good way. I really feel that I'm still angry at them until now even if my parents are already both dead - my mother in 2009 and my father in 2013. Honestly, I have no more communications with my 2 sisters and I have accepted the fact that they are already persona non grata to me.
When we were living in the previous house that we were renting, the caller ID was not available yet and our only defense for the phone is the answering machine. However, when the caller wouldn't talk on the answering machine, we are left guessing particularly so that some friends and relatives are shy to leave a message. I sometimes answer a call to be a prankster and it peeves me no end. There was a time we got a call at midnight only to scare us with a hissing sound. When the caller ID got into fashion, we always log the numbers that call us and make note of who they are. Now we never answer the phone regardless of there is a message in the machine or not. The caller ID tells us who they are. And for new callers, sorry, they have to identify themselves otherwise they cannot get in. At least now, we are free of the tension of those unknown callers.
The sleeping thing I mentioned before, it has to do with the waking/sleeping more than the proper asleep so it would happen in a very short time so fir the rest kust looks like you're spacing out but your mind could be giving you a whole scenary.
I don't know if this has happened to you but say you wake up and snooze the alarm for 10 minutes and by the hext time it rings you can recall you just had a dream (more like series of dreams) so long that feels like you spent way over 10 minutes.
So my guess is that it could ve something like that in the few minutes you space out, since you never go completely to sleep those dreams start related to your surroundings.
For any person, having poor sleep can also help us become more prune to memory distortion. So trying to ensure you get a good sleep is a good first step while you get an specialist to tell you why you keep recalling so vividly recent false memories.
Lastly another trigger is extreme stress and anxiety, so also try to see if you can find a pattern between the creation of the memories and both your anxiety and sleep levels.
Hopefully that might help you reduce the ocurrences.