Kevin, after reading some of the other's posts on this thread, I started thinking of several instances when I have felt this sensation other than that day in my guest bedroom.
I believe it was Trinity who mentioned feeling this way in an antique shop, which really struck a chord with me. I have been in places like that, one in particular, that I did feel this sensation strongly. Like I said before, it almost feels as if your equilibrium is a little off -- even a little similar to "medicine head", when you've taken a strong medication.
I've also experienced something very similar in museums, and even gotten a few "flashes" of people in my mind's eye that may have had some sort of tie with the place.
The most intense of these experiences happened when I was visiting the Tower of London a few years ago, which is notoriously haunted. I literally felt like something was pushing me, physically toward one of the cells, and again down a flight of stairs -- it was an extremely unpleasant experience. One of those "feet don't fail me now" times. Our tour guide even noticed that I looked a little shell shocked and discreetly asked me if something had happened. I wish now I had been a little more forthcoming with him, just to have seen if any of the other tourists had similar experiences. I was a little afraid of getting that "growing two-heads" look!
Anyway, I feel pretty sure after reading your description and thinking back to some of my own experiences that this more than likely was a case of some sort of "sixth sense." It might not hurt to write some of this down and document some of these feelings, just in case there is some pattern to it. It sounds as though you may have some sort of increasing psychic awareness.