I have never been a JW!! So the comments above about evil apostates do not apply here. I love all youth and have worked with youth in my spare time my entire adult life.
How are your parents treating your siblings now, how will they treat them in the future? Do you want your siblings to go through what your going through now? MHO, your parents are being very abusive. I was a much older parent but when both of my children reached the age of 17 they made their own decisions, went where they wanted and did what they wanted.
We live in a very large state but if you are any where near either my daughter or myself we WILL reach out to you somehow!! My daughter is a teacher, she is aware of your situation. PM ME please!
Please note my prior post.
Your state has a Child mental health care system and it is free up till you are 18. Also please go online and research your state laws for emancipation you may qualify for a couple of reasons primary because of the fact that your parents are withholding medical care. The age is 16. Please PM me as to what part of our state you live in.