What stage of puberty am I in?

I have pubic hair, which is in the triangular form it is suppost to be, but its not fully grown to the regular adult form. Im not flat but Im not fully chested, Im somewhere in the middle. I get acne a lot, and Im always craving food...(if that helps). Im about 5'4 and I've been growing fast, about two or three months ago I was 5'1 or 5'2. I weigh about 95lbs. Oh and Im also 12 years old. Can anyone tell me what stage of puberty I am in? thanks!