you could be pregnant
theres nothing dangerous about pre-come but it does contain sperm
netball wont effect anything
amychristina is right. the morning after pill shouldn't be used as a form of BC. BUT!!! it will prevent you from getting pregnant by 89%... and i like those odds. but you need someone who is at least 18 to go and pick it up for you becuase otherwise you need to have a perscription... and i doubt your parents will be happy about that. but in the future i would suggest being more careful..
yes - you can get pregnant even if you immediately go to the bathroom afterwards.
not sure what netball is, but um, if it's a sport then yes, you can still be pregnant.
just because you haven't used condoms in the past and continued to not get pregnant does not mean that you won't be this time.
pre-ejaculate is not more "dangerous," but it most definitely CAN get you pregnant.
the "morning after" pill should not be (in my opinion) used as a form of birth control, but yes, it is there for you to get should you feel you need to prevent any fertilizing that may be occurring. In my experience with it (when I was also 17 years old) was that it made me horribly sick and wouldn't have helped prevent a pregnancy anyway, since I couldn't keep it (or anything else) in my stomach after taking it.
Please be more cafeful in the future, since you are clearly not in the place for a pregnancy to occur.