Stuff happens. If I had a dollar for every pregnancy scare my wife and I have had--as an engaged couple and married--I'd be rich. You just gotta' learn to consistently use birth control if you don't want a pregnancy. Mistakes happen, and people get carried away in the heat of the moment. Get that pregnancy test at the drug store and get an answer to your worries. Don't go down that road of 'what if' until you have the facts. Let us know what happens.