What is that tiny hole above a woman's uretha and what is it for?

Misidentified?: The next hole "above' the urethra is the naval (belly button). This leaves us with 2 possibilities: 1) misidentified vagina, in which case the tiny hole is the urethra and the thing you think is a urethra is a vagina. Or... 2) there's a prominent clitoral hood and a small clitoris giving the impression of a "hole." does this diagram help? http://alturl.com/yqg7o.

Clitoris?: As seen in the pic, above the vaginal opening (introitus) is much small urethral opening or meatus. A short distance above that is the clitoris. In normal anatomy, there are no other openings. Development does not always follow the book, though, so anatomy can result that does not look just like the picture. At age 19, you should have a gynecologist do a good exam and answer your questions.