Childhood
What's
childhood? Let's see some good source. For example, Encyclopedia Britannica: "childhood, period of the human lifespan between infancy and adolescence, extending from ages
1–2 to
12–13." 14 years old (and I guess plus some months), let's assume that you're at least 14.1 years old
makes you a solid teenager.
You left your childhood and you're already in your
adolescence.