I had sex on the third day of my last period and took ec on the same day itself within the next hour. As far as I remember, I did?t experience any withdrawal bleeding as I normally do, which may be because I was already in my period. But now according to my cycle I am 6 days late for my normal period. I am getting worried if its due to a possible pregnancy. I had sex a couple of times the month before that and had experienced withdrawal bleeding and my normal period at the expected date. How many days should I wait until I take a pregnancy test? I had also experienced minor bloating and diarrhea and lower back ache for a couple of hours so I assumed I was getting my period. Normally I get my period within hours of experiencing symptoms. But now i?m worried. Please help!