Please help my illness!

Hello,

I’m Tünde. I’m 18 year old, and I’m a student at a secondary school. I live in a small town with my parents and with my two brothers. We’re very happy, but I have a huge problem. I’m young, but I had a lot of illness and I went under a lot of medical treatment. But this condition really scares me. I have a constant headache for more than one and a half year now only with small breaks (one day). I can’t live my everyday life fully. Sometimes it hurts so much, I can’t bear it anymore. I can’t sleep at night, and I feel very sick. I can only sleep, when I feel more tired than in pain. I studies so it’s really hard to concentrate after a long night. Once I fell asleep, because I couldn’t sleep at night. At the end of the year I'm going to go to graduation. I want to go to college, because I wanted to be a doctor. A doctor, or a vet, but with this condition of mine I don’t even has a chance. I worry about my future. My only chance is if the doctors can find out what is happen and what’s wrong. I went under a lot of tests, but they still couldn’t tell us what’s causing my illness. The doctors say I still have a chance if I go under special, private tests that can finally show the problem and with a therapy my illness can be cured. But unfortunately we can’t afford this. These are very very expensive, and our family doesn’t a rich family. My parents worried about me, but I know, that they’re happy if they can pay the bills. That’s a wrong life situation, but I would like surprise them, and I would like to pay the costs. That’s why I need your help. If nothing changes I can’t stand a chance to get into university and live a balanced, happy, and full life, and the most important for me that my parents will remain unhappy.

Please help me if you can. Maybe that’s the last chance.

Thank you so much!