Hair Growth Remedies

Just curious. If you are a teenager, then is there a set “time” for your voice to mature.
And is it possible to extend your range still in the higher octaves? I want to be able to sing a top top E comfortably. I have a top top C at the moment.

The last couple of months there has been more hair on my legs, arms, unmentioned places, and even my hands (which is weird). I turn 21 in a few months and my wisdom teeth have started to grow in fully at the same time that I have had this unusual body hair growth. I am a girl.