I think it's very responsible to think about your future. It can only take one time to get pregnant.
Do you have a gynecologist? If not, your family Dr should be able to recommend one. You can also go to a woman's clinic to get birth control.
There are several options to choose from so that's a good thing.
Condoms are a great form of birth control and I highly recommend using them. If you have a boyfriend and know each others sexual history, meaning both of you have no STD's, then birth control pills are a great option. Your gyno will go over all of the option with you.