That's right!!
It's all about proper diet and nutrition and most important of all: 8 hours of sleeps
Sounds to me like your immune system may be pretty weak to begin with not too mention that if you don't know what an infectious disease is, then your school ain't even worth attending...
Could also be some kind of serious food allergic reaction you are having as well....
Could possibly even be the beginnings of Crohns Disease, which is no joke.
Fasting is a good way to detox and get pure real quickly.
Fasting meaning no foods, just lots and lots and lots of water.
As long as you don't have any blood sugar imbalance, this should make you feel a whole lot better.
Do you have access to a vegetable juicer??
Because that can be your drug store!!
There's some real good books out their about the benifits of juicing too.
Aloe Vera Leaf Juice / Gel is an incredible way to start each day.
I take a double shot (2 ounces) right before breakfast, and man it makes my insides feel sooooo good.
The part which is catching me off-guard is you saying you are forced to live in a house and go to school.
Why??
(...and is it really that bad??)
Those who have not yet left the nest typically live a life of little to no responsibility so enjoy it while you can*
(*disclaimer: that's a general statement, I realize it does not apply to all/may not apply to you....)
Sincerely hope you feel better, there's nothing like feel good both inside and out
(and, I sorta know what you are going through, as I'm presently now on a very limited diet to keep my insides in check, but it's working out very very well for me so it's way worth it)