It started like a month ago when we were camping.
Anyway, like that third night we were up there, we were sitting around the campfire playing cards, and the only thing I could possibly compare it to it as would be if someone flipped a switch for brain activity.
It was like falling asleep, almost, even though I have full memory of the event, and even the conversation that took place.
The feeling was that of being in a dream; everything was rediculously surreal, and I could only compare it to being in a dream.
Either way, it continued off and on since then.
I went through about a week and a half of feeling decent, then, about a week back, i got the exact same feeling as I did previously. It's not slow, and I can't tell when it's coming. It just hits me, and it's often accompanied by a feeling of falling. (But not always)
But anyway, it's kind of like a lingering feeling of irreality, like what I'm seeing visually isn't making a proper connection to my brain. That's the basic feeling I've had the last month, with only about a week of feeling "normal" inbetween.
And when it gets more severe, it hits in waves. I'll be feeling lousy, but not entirely out of it, then it's like I just walk into a brick wall.
And when I was up camping, we had went down to the ER (lower foothills) because they said it may have been altitude sickness. But, unfortunately, that was proved wrong because it did not dissipate after decending.
But, anyway, down to the point. For the last month I've been feeling like this, and they already did a CAT scan which came back fine. And, obviously, seizures cannot be detected on CAT scans.
But now they want to do an EEG because they think i may be having a seizures. I'm scheduled for a week out, today.

But what I need to know is this.
Are these feelings common in simple-partial sufferers, and, if so, do they commonly linger as long as mine are?
Is this overwhelming feeling of irrealism treatable in any way, without meds, for the time being?
Could this be anything other than a seizure?
Is a basic EEG reccomended, or would a sleep-deprived EEG be more precise in it's results?

Also, for reference, I have never had a history of suffering from any types of seizures during my childhood, nor have I ever experienced anything equivelent to this before.
I do not have this commonly described feeling of "deja vu" as most do, but only a lingering irrealism, which hits it's apex 0-3 times daily. (...possibly during a seizure?)
The only other effects I have is a severe tension headache, with a burning on the base of my skull/neck, sharp pains in my temple and an overall pressure throughout my whole head. Pain relievers cannot even take the edge off, and I've had this headache for now, over four days, and off and on for months. (although it's yet to be as severe as it is currently)
It's indefinate as to whether or not I am having seizures, but what else could it be? Even the doctors can't give me any answers.
I've also had a low grade fever, off and on. (99-100 degrees F)

Please, though; please help. I'm an overall healthy 13 year old female, and I feel like i'm going crazy. One whole week without a break from this lingering irreality, I feel like I'm losing my mind!