Nausious ALL the time, and abdominal pain?

First of all I'm 16 and not sexually active, since i've heard a million times that i just sound pregnant. So Its been going on since December where I've felt nausious all the time and I feel like I'm just going to barf! And then the rest of the time I have abdominal pain that is unlocalized. Basically it hurts where the actual stomach is and it also hurts down lower below my bellybutton. I've had pretty much every blood test done, and in a CT scan they found liquid that they don't know why in my pelvic area, and a small cyst, liquid based, on my kidney. They did urine tests found a UTI, A yeast inf. and I've found many places with dermatitis, but that's all cleared up. They looked at the kidney and my overies and told me that it was fine, and the ultra sound lady said it looked like i had those spots where it looked like i had some cysts explode on my ovaries. They don't think its an allergy, or one that we know of, and basically ruled out some. Any Ideas?? The one thing they blamed it on was depression and they put me on the depression pills to calm my stomach along with prilsec, the depression pills made me worse mentally and the prilsec didn't really help... Any ideas would be so Helpful!