Double check the age of independence regarding health in your state. Some are as low as 14.

"The Tennessee REDLINE (1-800-889-9789) is a toll-free information and referral line coordinated by TAADAS and funded by the Tennessee Department of Mental Health Substance Abuse Services."

TAADAS – The Tennessee REDLINE

Teen & Youth Help Hotline | Teenage Advice, Crisis & Depression Helpline

Again, you doctor is a valuable resource.

I believe an online school would still be required to offer some sort of guidance program.