You need to learn from your mistakes. Luckily there are a few things that can be done now, mainly abortion and the morning after pill. If you want the latter you must act very, very quick it's only legally available for a certain length of time after she got knocked-up. As for abortion, at an early stage in the pregnancy it's nowhere near as horrendous as it is when you're one week away from the cut-off.
Saying all that; she might not be pregnant at all!