hello pls I need your advice, my last period ended on the 1st of february, I made out wit my boyfriend on the 12th of feb, and sperm got on my thighs, so I took an emergency contraceptive pill 28 hrs later, today 20th feb is seven days later now, and I noticed I m having a brownish and bloody discharge. pls is this implantation bleeding or what could be the problem? Am I pregnant?