You're 19...I would wait a little bit. You
probably don't feel like it, but you're
young and big decisions like these don't
always get well thought out (I'm assuming
you're like me

)
If you do decide that this is something
you want to do, you NEED to shop around
for a surgeon. Don't go for the
cheapest...cuz then you'll end up looking
like Tara Reid (she went to the cheapest
surgeon in the area, and her boobs were
VERY f'ed up...she has to get tons of
surgery to fix what was done). Talk to
people that have had them done, talk with
the surgeon(s) about what you want and
what they are willing to do. You don't
want a "yes ma'am" for your surgeon...it
would make me feel better of the surgeon
told when too much is too much.
And, with any surgery, comes risks. These
are things you will need to discuss with
your surgeon once you've decided. When you
go to a consultation, they will try and
answer some of your questions about the
consequences of the surgery.
Give it some time...if in 3 years or so
you will want it, then I would say sign up
for a consultation.
Good luck!