Is this just a nightmare or...?

My friend Tessa had that happen to her, and she didnt tell anyone and eventually it stopped. <3

I will be direct.

Dreams are meaningful in so far as you attribute them meaning. If you have had many night terrors precedent to this particular night terror, there must be a difference why you remember and regard this night terror. Why? You heard voices beneath your pillow.

That you remember the dream because of the auditory hallucination or the auditory hallucination because of the dream, I presume the former. That they are related by time or by biological predisposition, I presume the latter.

Night terrors are primarily caused by neurochemical imbalance as are auditory hallucinations. You have a history of both. Not too much of an abductive reasoning process to conclude you have a neurochemical imbalance, eh?

I am neither a doctor nor a psychologist, I am just a philosopher with a reasonable stock of knowledge, so please do not take my hypothetic abduction as the authoritative science behind night terrors, but do please see a doctor. BEFORE you see a psychologist or, God forbid, psychoanalyst: you seem to have an absence of psychological issues sans the reported symptomologies, so the physical likely precedes the mental for you, so you do not need either of the two saying you have repression or abject material, et cetera, plaguing your psyche like some Dickensonian ghost.

And yes, that last bit was a jab at EscaSeven. I agree whoever posted this needs to do something, but I disagree there to be any intrinsic meaning to the dream. THE UNCONSCIOUS IS NOT A THEATER. Any meaning to be had is to be had by the relative proximity of the issue and necessary discursive problematic to consciousness and the subsequent meaning the unconscious would attribute to the presently meaningless objects. In other words, say, I felt my wife to be falling out of love with me, but after all that we have been through I neglect the very possibility and, in effect, repress it. As I we go on living and I do not change whatever it is that is the reason for our failing marriage, more and more of what could be called signs of marital discontent begin to emanate from wife. In her habits, her glances, her joie de vivre, if you will, lost to my repressed impotence, and with the utter obviousness of her discontent about and my repression of the possibility of some impotency I begin to think about it with some regularity, and with that regularity comes the proximity. Dreams do not perform symbolic performances of daily events, rather it is the proximity to consciousness and certain predispositions that attribute them the qualities to cross the limins that give dreams and their subsequent interpretation the representational quality, not that they are intrinsically embedded with this meaning.

Anyway, I hope you, whomever you are, do get better, and I apologize for perhaps being a tad indecipherable. I do have much trouble translating what I think into a more public language. :)

It sounds like you are in contact with a Spirit either intentional or not. I teach people how to read and see Spirits, ghosts, and the astral plain. I wouldn't worry about this knowledge though. When you are in direct contanct with any spiritual being or energy, fear will only make the situation worse or harder to understand. It doesn't seem as though your encounters with the spirit or spirits only relates to your grandmother's home, unless you only have these dreams and feelings there, my guess is it travels with you. Sub-conciously you have allowed and accepted this to occur, so I am going to bet that this is not a malevolent or bad spirit. Most likely you are looking for something, an answer, or someone is trying to contact you from the other side. Be mindful, aware, and never be afraid or have fear, always try to understand it and be mindful and aware of what you are learning and experiencing. If you can, keep a notebook next to your bed, and write down what happens in your dreams as soon as you wake up as to not forget it. Then proceed from there, the more time you spend on this, the more you will undestand it.