Can Anyone Explain This? Options

I'm pretty sure I know the answer to this, but I wanted to open it up to other interpretations.

Two nights ago I was sleeping at my girlfriend's place. I had a pretty restless sleep (felt like I was awake all night).
Just before I drifted off after waking up for the tenth time I distinctly heard someone shout the word "out". Now what was strange about this was that I didn't hear it with my ears, I heard it in my head as If I was thinking to myself, but it was a different voice to my own.

The voice was a man's voice of about middle to late twenties maybe earlier thirties and was very clear and powerful sounding (demanding me to get out?) however, I didn't sense any sort of anger from the voice, it sounded powerful and demanding as I just mentioned, but I didn't fear it. Of course I got a bit of a shock hearing someone else's voice in my head.

So at first I thought my studies are getting to me and I'm going insane but I then though about my training in CM.
The last few days I have done the LBRP every day. Before this week I found it hard to find the time to do a ritual at least once a week. So I thought that the increase in magical practice has increased my awareness to the spiritual environment and I have telepathically picked up on some spirit's vibe who has apparently been telling me to get out from some place (girlfriend's house?) and I have only started to tune into it.

It didn't happen last night at my place so I'm guessing the spirit is based at her place or just visited me.
I don't know of anyone passing away at my girlfriend's house (her family has lived there for about 12 years) and nothing strange has ever happened to her place which could suggest a haunting, so I'm baffled as to why I heard this voice.

Of course I could just be going insane (IMG:style_emoticons/default/insane.gif)

I decided to post this to share my story and to get some opinions. So what do you guys think?

@paxx

Nothing like that happening here. I'm fine and dandy with my girlfriend atm so that rules that out. I can't remember If I was thinking about anything else before hand so it could possibly be that? I was under a lot of stress last week (Higher School Certificate - final exams = lots of stress) but they're finished now. Maybe I wanted "OUT!" of my exams (IMG:style_emoticons/default/13.gif) .

@Acid09

Nice to hear a logic point of view, I was starting to think I was crazy.
I've heard about these before, and have actually experienced them once or twice throughout my life. One time was when I was falling asleep I was lying in bed and felt something grab my foot and snapped awake, jumping to my feet in the process. My mum (being very spiritual and all) believed it to be a spirit, and possibly an evil one because it was grabbing and mainly at the ankle (which she thought was evil because she believed more benevolent spirits would either pat, stroke or something similar. One of the other members of my extended family was actually reading up on psychology and funnily enough stumbled over pre-dream episodes as I experienced this. She attributed this to being one of these pre-dream episodes as I had experienced something similar where I felt something crawling on my face. Thinking it was a spider or something I jumped up and looked for it, but there was nothing in my entire room (took me about an hour of searching before I deemed it safe to sleep again).

So what your saying could be the answer. I slept there the other night actually. Same situation and everything, however I was out drinking with some friends so I was a bit wasted (IMG:style_emoticons/default/13.gif) . I was fine when I went to bed though and nothing happened, so I'm pretty sure that if there was a jealous spirit there, they would be even more annoyed at the fact that I was in a semi drunk state and sleeping with my girlfriend.