Open Question: Extra body hair??? I'm only 15!!?

I have excess body hair. I am 15 years old and I have a few hairs on my neck. They are black like pubic hair and it is long. I also have some hair on my nipples and A LOT of hair on my belly button and my back?? On my vagina I have like a fricken bush!!! It is horrible! It pokes through my underware and it is everywhere! Is there any reason why I have extra body hair? And also how can I get rid of it??? Please only serious answers!! Also, I am going to my 1st Gyn exam and I would like to know what happens from start to finish and should I get rid of my pubic hair on my vagina? It is right on the outside of my vagina and also on my butt where my anus is. Thanks for reading!! :)