"i took plan b after an unexpected unprotected sexual situation.  after the fact i realized it was right around my fertile time.  i went right to the store and purchased plan b.  i took it about an hour after sex.   i am usually very sensitive to the hormones in oral contraceptives (that&#039;s why i don&#039;t take them) and i was very worried about the side effects. i was surprised, i had no side effects at all.  i was concerned because i thought maybe it wasn&#039;t working because i had no cramping, headache, nausea, etc like the package said could happen.  i calculated the day that i should get my next period and waited.  i was sweating it the entire time!  i ended up getting my period about 2 days earlier than expected...fine with me!!"