"my boyfriend and i had sex and the condom broke. i&#039;m normally on birth control but had an adverse reaction to  a new prescription and stopped. we immediately drove to walgreens and bought plan b one step over the counter. i was frightened by the amount of side effects people mentioned in previous reviews. all i had was a light headache and i was tired, but these only lasted 1-2 days. my period started about 10 days after taking the pill (and about 3 days earlier than normal) and it is a very heavy flow, much heavier than normal (which is fine with me if it means i&#039;m not pregnant.) just give it time and try not to worry. it will work. $53 is definitely money well-spent"