I can see where you would have trouble with the underage thing, but your parents would probably end up more involved if you hurt yourself bad enough to have to go... Trust me, I know how it is to avoid your parents, as when I went in, my dance teacher took me.... That being said, if you go in in the mental state you are in, and tell them exactly what you said here, they will more than likely take you seriously enough to admit you the same way as if you had hurt yourself and gone in that way... I would definitely see if a close friend would be willing to take you, and more importantly, sit through it with you if you need it... It's tough going through all of this, but I know you can get through it!!