@Confused19,
Confused, you seem to have no concept of future possibilities, and to take advice here as some kind of insult to yourself. This is foolish, for both you and your girlfriend.
I strongly suggest visiting your local Planned Parenthood place. Even if you don't want to use contraception, they still have good data and are worth listening to. Certainly your poor girlfriend should check it out, and I don't mean poor in the financial sense. You are both are being stupid, and many of the rest of us get aggravated reading about it. You say you are nineteen? Sound more like twelve. Really. Please get some information . Even go to the library.