"i had a mishap with my boyfriend on sept.4 where he came inside of me and immediately ran to cvs to get the plan b. i took the pill within an hour of the accident.  i&#039;m not sure whether it was a mixture of the plan b and my regular birth control (which i started sept.5) but the side effects hit me hard. i was extremely naseuas and fatigued. i mean to the point where any physical activity was draining. this went on for the next two weeks with mild cramping in between. the side effects subsided a bit but i am happy to say that my period came today sept.29 only a day late! i am well over the &quot;weight limit&quot; for the pill and it worked for me and i was very fertile according to my ovulation calend. hope this helps someone ease their minds a bit!"