Mental Illness Concern

I'm worried that I have a mental illness, be it OCD, Depression, Anxiety, or something else. I am 17 and I can't tell my parents because they won't believe me or support me. I have been raised being told I'm wrong and had so many expectations dumped on top of me that I feel like I'm drowning. Everytime I think I get ahead I am criticized for what I'm doing. I'm tired, my body hurts, I obsess over making (some) things perfect. I don't know what to do. Should I just wait until I move out or is there a way I can talk to a doctor without having to deal with my parents?