I lost my virginity on 24th. He used condom, then after I took plan B incase within like 23 hours. I bleeded a little on 25. Then I am having brown color discharge. I consulted with my friend (she works with a doctor), she told me I not pregnant. I usually expect my periods on 15 or 16th. I am so confused now, when I should expect my periods?? Am I pregnant?? Please help me.