Horrible false awakenings in one specific house?

[Blazewind]

I've lived in my current place, (a decent little apartment) for several years now.  I do get the odd false awakening in here of course, but ones that are more funny than anything once I wake up and realize what's happened.  Nothing to write home about.  Oddly though in my last home, (an old house that I shared with family) I used to get false awakenings on average of a couple times a month or so.  And there were of the awful and terrifying verity.  I used to dread it happening again, and obviously am beyond relieved to find it doesn't seem to happen like that since moving.

These ones back in that old place involved waking up (or so I thought at first) in a state where my whole room was turned sideways, or even upside down.  I'd stare at the ceiling sure it was a wall painting wrong and notice that next to it I'd see the carpet.  Things like that.  I could never wake fully up.  I was sure that if I could just get outside of the room and eventually outside the house, I'd be fine, but for the moment I felt too tired and sick to move.  I could barely see, like looking through barely open eyes at blurriness.  Sometimes I'd struggle with this for what seemed like an hour opening my eyes and closing them again, realizing I'd only half woken up and trying to wake up over again properly.  I'd hope that someone else in the house would come and help me but of course no one ever knew I needed help.  Often I'd phase off into a half asleep dream that lasted only a second and always involved another part of the house.  Once for example I found myself suddenly starting in the living room and finding it cluttered with stacked of packed boxes.  Another time that same room had been completely ransacked.  I once dreamed in a quick second of running into my mother in that same living room.  She started screaming and panicking saying I'd been stabbed in the eye with a knife.  It was all just nonsense really.  Nothing ever did make a hint of sense.  I'd finally wake up again normally, but sometimes it actually took several tries to land fully in waking reality.  It always did leave me shaken up entirely for the whole morning.

The thing I've found myself wondering though is why would such things happen specifically in one house.  I moved of course for completely unrelated reasons, not at all expecting that it would stop this, but to my great surprise and relief it did.  Was moving the best thing I could have done to stop this?  I've considered that it could have been medication related and not the house at all.  I was on come medication during part of the time I lived there.  This is though I didn't start taking it until a good while after these false awakenings started. Actually I was still on it for a time after moving too and of course it stopped when I moved.  I can't see a relationship between this and meds. 

This post was longer than I planned and I'm sorry for the length.  But I'm curious about the insights of others on this.