Welcome.
Do you have any experience at all in magick?
PS: You will continue to grow until you are around 25 years of age, so your body will even out on its own. Real magick is not like it is in fantasy novels and movies. No spell is going to suddenly change your body for you. You are in the middle of a natural process that you can really muck up if you don’t know what you are doing.
Also, please try using the search function in the upper right before asking a question. This is a not so unusual subject and there are already threads about it, like this one: