Well did she go and douche right away afterwards? Then she can't get pregnant! Or maybe do it in water next time.
Seriously dude come on in today's day of education are you really that blind to reality? Getting her pregnant isn't the worse that could happen, you could catch something that you can't take a pill to get rid of!
You are about to find out the hard way that love hurts and sometimes it ITCHES AND BURNS!!
Be responsible for yourself and your future always carry condoms!