My mother's side of the family has a history of mental illness, schizophrenia to be more specific. My grandmother was diagnosed (which she vehemently denies; she thinks the voices she hears are ghosts and she doesn't take her medication if she can get away with it), and my mother is showing a LOT of symptoms and I have tried to get her to get help about it to be on the safe side, and she won't, of course. She, like my grandmother, is convinced these voices are ghosts (probably where she got the idea), she has depression which she treats pretty unconventionally (if you catch my drift) and she sleeps through pretty much the ENTIRE day, and those are only some of her symptoms. She'll talk about the most random crap for hours on end and some of the things she says don't make any sense at all.

Now, on to me (oh boy, eh?):
I know I've hallucinated before, but since I'm sick so often, I used to write it off as having a high fever, then it occurred to me, there's something not right here. A couple of the ones I've had include seeing shadows in the shape of small children scaling my wall, parts of the room gradually growing lighter/darker then the others despite what the laws of light and shadows would tell you, and seeing things in different forms in my peripheral vision (like, say there's a vacuum cleaner next to me; I look at it and say 'Okay, that's a vacuum', then when my head is turned so I can just barely see it, it appears to me as a dog standing on it's hind legs [bad example but you get it, right?]).
Occasionally at night I will hear something like someone coming up the stairs or dropping things on the floor, and for the longest time I tense up thinking someone is in the house. Eventually I can convince myself to calm down but I feel very paranoid the whole night.

On several occasions I have heard 'voices', though not in the way you'd think, I hear beeping noises. I was riding my bike sometime ago and I heard the beep kind of like what your microwave sounds like when the food is done, but in the same tone, and it lasted for about ten minutes. No matter where I was, there was the beep, then it just vanished completely. About two days ago I was in an assembly at my school and I heard this low, monotone beep that lasted a couple of seconds, beeped about six times and then went away. It was VERY audible even with everyone talking, yet NO ONE (I swear to God on this) seemed to notice but me. Also, the speaker that day seemed to have a black 'glow' around him, I wanna say 'aura' because that's the only word I can use to describe it at the moment. On a crazier level I have heard human voices before, needless to say I was terrified. On one occasion I was lying in bed trying to sleep when I heard what sounded like a younger man with a raspy voice, about 20 or so, whisper 'It's (my name)' very close to my ear. Stunned, I jerked back awake and pondered about it for a minute, then I heard it again, it said 'It's never enough, is it?'
As far as talking to myself goes, I have caught myself staging an argument in my thoughts (complete with feeling offended/triumphant/whathaveyou), though I can't be completely sure if this is normal or not as it's something I've done very frequently. When I feel lonely I sing, to myself, apparently, but again, not sure if this is normal or not. I also act out comedy routines in my mind to absolutely no one (sometimes out loud), I imagine the audiences response as well.

I have trouble collecting my thoughts, like, something will make sense to me in my mind, but when put into words it doesn't. Or I can start on a certain topic of conversation and just go on and on and on until it doesn't make sense anymore to anyone. I have racing, random thoughts out of seemingly nowhere, and my word association is really wacky (so you can imagine I'm kind of bad at that game). Example, I was in class trying to catch some shut-eye, when out of nowhere the following sentence came to mind, narrated in a female British accent, as if I'd heard it before (I haven't):
And when Camilla finally got her braces, she admitted what we all knew: that she hadn't been assaulted by her father at age nine. (I wrote this down because it freaked me out so much, that and I don't know anyone named Camilla.)
And Spanish Homework > Needing a New Pencil > Stop bringing your pen to class > Regan from The Exorcist, apparently. For the record I have never seen that movie, only pictures.

Very frequently I feel disoriented, like I'm not completely there, as if I could wake up from a dream any moment and resume living in some separate life. And that definably sounds crazy, I know. Most of the time all I want to do is sleep because I don't feel like it would really make a difference, life is just some endless cycle of routine to me.

All this has been going on for a couple of years now.

I know this is long, but I am sincerely worried. Thanks in advance.