At what point do you go to a doctor?

I'm 15 and lately my depression has been awful my doctor diagnosed me not too long ago and prescribed me Zoloft but I my parents haven't gotten it for me yet. I've been mostly staying in bed away from school not really feeling much just doing things that make me feel anything except for sad and even developed an Ed to distract myself.

I also gained a sh addiction as of recently and now I'm sitting here typing with one hand because my left arm and both my legs hurt after sh it's not deep but just alot of red. Im disappointed in myself and therapy isn't really working for me I don't trust myself nor feel comfortable alone

Though Im not sure how bad it has to be in order to get there I almost went to the mental hospital for sh but it was determined I was mentally stable enough to go to school and didn't need hospitalization but it's gotten worse since then.