"i took this pill next day after having unprotected sex with my bf. i don&#039;t want to be pregnant because i&#039;m still in studyingl. i didn&#039;t experience anything other than the lower back pain and heavier than normal periods for the next 3 months of each period. i also didn&#039;t get the breakthrough bleeding that some of you girls experienced. 
4 years ago i used plan b as well i remember it was in 2 pills form, and it also worked fine and i think that two pills formulation is better, because i didn&#039;t get any lower back pain and the heavy flow periods as a side effect. so i wonder if they bring back the two pills formula than only one pill, may decrease the back pain and heavy flow, or  i&#039;m just getting old. haha .
good luck to all of you!"