Me and my girlfriend had sex (first time for both of us) last Thursday. I didn't finish we used a condom and she's on birth control. Her period is 2 days late now though ( we ended up having sex again Tuesday same situation as before except this time she took plan b the next day) the odds of her being pregnant aren't high at all right? She's craving chocolate and her breasts and back hurts as well (which is her usual period problems) except she's not cramping and not getting headaches as she usually does. Could she be pregnant?