My gf took plan B a while back and it did cause her period to come late. Making the period last from May 15-May 21st. We had sexual activity on June 1st, i did not ejeculate, however i am concerned about pre-cum. I didnt penetrate rather, i used my fingers. I believe there wasn't pre-cum on my fingers. Few days later April 5th her "period starts". it says on the calender its a week-ish late. Is she pregannt or is it plan b because it messed up her cycles? We have also been working out more causing stress on her body, and making her very sore.