June 19, 2013 I lost my virginity, june 21, 2013 I got my regular 7 day period. July 2 , 2013 I went to the hospital and took a pregnancy test, it was negative. It is july 15, 2013 and while wiping using the bathroom I noticed a few drops of blood but two hours earlier I had pinkish brown discharge. My next period is supposed to be july 19, 2013 but the pinkish brown discharge is making me think im experiencing implantation bleeding.......what could be wrong?