On valetines day my boyfriend and I had sex without a condom, and he pulled out before he cummed. He layed the towel on my stomach and he did it in there. But on sunday I ate bojangles and drunk a mello yeow and i've been throwing up ever since then but my mom says it could be just what i ate since grease and citrus stuff dont mix. But my period was suppose to come on today, but it hasn't. Could I be pregnant?