My last period was on July 11th and finished on the 16th , I had unprotected sex on July 31 took plan b pill 45 minutes after sex . The week after taking the pill , I had nothing but cramps going on , and the next week on the third day , 13 days after taking the pill I have a brownish discharge on my underwear , as I'm assuming it's spotting , but now I'm getting heavy cramps almost as if I'm about to get my period soon.. Can I take a pregnancy test now before my period starts ? This is my first time and I have no ideas what I just got myself into!!