I was wondering if I would be able to drop out of high school all by myself I have very bad anxiety, depression, PTSD
If you have the issues you describe, then the School District is required to provide you with appropriate related services to address your disability so that you may access your education. At age 17, you must enlist your parents' assistance in such a request. If you do not have an IEP, then you should start by asking for the District "to evaluate you for specific learning disabilities". Send the request in writing with proof that the District received it (e.g. fax or Email confirmation or Priority Mail).
the District will request that your parent(s) sign a PTE (Permission to Evaluate) form. They must sign it before the District is required to evaluate you FREE to you and your parents. The form will look like the one at: https://www.pattan.net/getmedia/272105f7-759c-4ac7-b70f-932e6a1baf52/PER-070108) . If you don't get the form within 10 school days, then your parents need to contact the District and - if necessary - go to the District Office and demand the PTE form, sign it while there, and ask for a copy. Once received, the District then has 60 calendar days to complete the evaluation and present it to your parents. At your age it is not required that you be there, but it would be to your benefit to attend and advocate for yourself (and let the IEP team see yor anxiety in person). If that is too difficult to attend in person, see if you could "attend" by phone or video conference. They must legally accommodate your communication preference presuming it is reasonable for your circumstances.
If you have an IEP, then apparently it is not effective. Ask for you to be "re-evaluated to determine your specific learning disabilities and how to address your anxiety, depression, and PTSD", If you are treating with a psychiatrist or psychologist, then ask them to assist in providing recommendations to the school as to how to assist you to access your right to a free appropriate public education. (FAPE). If you still dont' get anywhere, then you should speak with a parent education attorney.
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