Could I Have A Tumor? What’s Wrong With Me? Please Help.?

I am 13, I am of average weight, fairly slender. I exercise [my dad taught me how to exercise properly so, it's not that] I am tall too 5′10.
My vision is terrible 20/-4.75 [I think, it changes about every month or two; contact wearer]- no astigmatism
*Have experienced sensations where everything goes dark [eyes open and their don't seem to be any correlation with what I am doing/time of day/where I am, and these occurring]
*I tend to be a klutz, I have great balance and an avid martial artist, but for some reason I will trip or fall for no reason.
*I experience mild to severe pain in my joints, back, shoulders, neck, and pretty much everywhere. This pain is almost constant and the pain arises with no trauma occurring.
*I get headaches quite often and have extreme light sensitivity [even fluorescent light bulbs hurt my eyes, they begin to then water.]
Sun, computer/TV/cell phone screens also cause watering of my eyes [sometimes my nose too]
So,
*pain all over my body<primarily joints, neck, and back<Long, Long time.
*rapid vision change; not for the better about every month a new prescription is required<as long as I can recall
*being a klutz although I have a strong core<as long as I can recall
*blacking out for no apparent reason<as long as I can remember
*breathing normally then suddenly having extra air to exhale<fairly recent
*light sensitivity<This started within the past couple tears
I am under a lot of stress, primarily because of my parents fighting. When they fight I do feel weak in my knees and sometimes they collapse because of this.
I don't drink, or do drugs, and I eat healthy.
I ya'll have any ideas of what is going on, there are some other things, but these are the main problems. Any help is appreciated; Thank-you
[No, I can't just talk to my doctor, my parents won't listen and they think nothing is wrong]
I also have trouble getting my eyes to focus.
No, I am not sexually active [idk if that matters, but it might]

Could I Have A Tumor? What’s Wrong With Me? Please Help.?

I am 13, I am of average weight, fairly slender. I exercise [my dad taught me how to exercise properly so, it's not that] I am tall too 5′10.
My vision is terrible 20/-4.75 [I think, it changes about every month or two; contact wearer]- no astigmatism
*Have experienced sensations where everything goes dark [eyes open and their don't seem to be any correlation with what I am doing/time of day/where I am, and these occurring]
*I tend to be a klutz, I have great balance and an avid martial artist, but for some reason I will trip or fall for no reason.
*I experience mild to severe pain in my joints, back, shoulders, neck, and pretty much everywhere. This pain is almost constant and the pain arises with no trauma occurring.
*I get headaches quite often and have extreme light sensitivity [even fluorescent light bulbs hurt my eyes, they begin to then water.]
Sun, computer/TV/cell phone screens also cause watering of my eyes [sometimes my nose too]
So,
*pain all over my body<primarily joints, neck, and back<Long, Long time.
*rapid vision change; not for the better about every month a new prescription is required<as long as I can recall
*being a klutz although I have a strong core<as long as I can recall
*blacking out for no apparent reason<as long as I can remember
*breathing normally then suddenly having extra air to exhale<fairly recent
*light sensitivity<This started within the past couple tears
I am under a lot of stress, primarily because of my parents fighting. When they fight I do feel weak in my knees and sometimes they collapse because of this.
I don't drink, or do drugs, and I eat healthy.
I ya'll have any ideas of what is going on, there are some other things, but these are the main problems. Any help is appreciated; Thank-you
[No, I can't just talk to my doctor, my parents won't listen and they think nothing is wrong]
I also have trouble getting my eyes to focus.
No, I am not sexually active [idk if that matters, but it might]