"i&#039;m 44 years old so not sure if it was the pill that indeed resulted in the negative pregancy test.  first, i always practice safe sex and even go over board in making sure its put on properly, etc. so you can only imagine how surprised and devastated  i was when he withdrew and told me what happened. i immediately went in panic mode because i barely even knew this guy. he was very nice and very supportive through it all though. i took plan b about 4 hours after the incident. it was 14 days from the first day of my last period so i most likely i was ovulating. i did have some side effects but none were listed on the box so may not have been from plan b.  i had a stiff neck for 3 days and very vivid dreams on the 3rd and 4th day. that&#039;s it!"