I had symptoms of clinical depression since about the age of 13, though I didn't bother addressing the issue with a GP until I was about 24 and ready to try some prescription medication.
I also feared what the drugs would do to my developing brain and I didn't ask for meds until I was well into adulthood because of that.
_________________
“I was ashamed of myself when I realized life was a costume party and I attended with my real face” - Franz Kafka