Hi sweetie, i'm sorry that you're dealing with pain issues on top of the emotional and physical abuse that you've had to endure. The most important thing you need to do is to get a proper diagnosis and treatment. You believe it to be lyme disease from the symptoms i take it. Have you not gone to the doctor for a blood test yet ?
(Lyme disease, caused by bacteria transmitted through the bite of infected ticks, can bring on a host of troublesome symptoms: fever, headache, fatigue and a red, circular skin rash.- Once diagnosed, usually by noting symptoms and getting a blood test that detects antibodies to the bacteria, doctors typically prescribe antibiotics for two to four weeks. Left untreated, Lyme infection can be bad news for the joints, the heart and the nervous system.)
So you have a choice to make about where you're going to live while going through secondary school. as well as the choice for what to major in. You don't need to pick a major in the first year, you can take your time to do that, once you're out of the house and living with actual "friends".
You can get help from student counselors about your future, your parent's are of no help to you. Was your mom and dad going to pay for your education, and were they holding that over your head, so that they can choose your major for you ? with a threat of not paying for your education if you don't choose what they want you to choose?
Here in Canada it's easy to get a student loan, for education costs and living expenses. My son has lived on his own since he was your age, and is still going to school He chose to get his BA in English Humanities, and now is attending a Construction Engineering course. He got a job through the university with the government and has always had a job at the local pool/ working a few days a week, to one day a week now. He's able to go for any government jobs that are available while he's working part time with the government.
Honey , there are SO MANY opportunities out there for you. Your parent's did not take the opportunity to raise you so that you would be confident moving forward, and that's unfortunate., but PLEASE , don't think for a minute that you're not going to be okay. YOU WILL BE OKAY. You've come to the right place to make a few friends, that can honestly take the place of your parents. My parents had to be replaced as well. I had to walk away from my family and make true friends to support me. Where there's a will, there's a way.
I've got experience with a teenager going through university and now college. I know you're going to be okay, just stick with positive people,, and your life will feel more and more positive.
I don't know why we got stuck with loser parent's honey. All i know is that you can rise above this, and have a family of your own where you can lead Positively. (if you choose to have kids). Your partner in life , will be the person that will care for you moving forward. Right now, whoever it is, is hopefully attending university and working, and getting ready to be the best mate they can be. YOU'RE GOING TO BE OKAY. I PROMISE.
You need to think about getting a resume together, so that you can try to pick up on (hopefully) a government part time job.