"i am 24 years old. i was on the birth control pill microgynon for about 5 years straight. i got off it in the beginning of march. on march 26th, right before my period week, we slipped up. so we grabbed plan b. i had taken it before i was on birth control, and had no side effects. but this time i felt everything. so for two days i felt nothing. and then on the 2nd day i got shaky &amp; hungry.  on the 7th day i cramped, sore boobs, emotional, &amp; hungry until 20 days after i took it. i got my period exactly a week late. i cried so much during that time. but trust me. your period will show up. you absolutely will feel pregnant but chances are, you aren&#039;t."