Most Helpful Girl
Tell her to calm down and tell her you aren't mad. Once she calms down and stops crying, figure out what you guys want to do about the pregnancy.
Most Helpful Guy
you guys should go somewhere peaceful preferably a bedroom or dim living room and bring the tension down by assuring her you are not mad. Then you need to (gently but firmly) talk about the pregnancy and this new change in your lives. Play ambience music, give her a cup of tea, light candles, make the atmosphere less stressful.