"i&#039;ve taken this 2-3 times. the first few times mild cramping occurred but nothing major. the most recent occurance resulted in cramps immediately afterwards and bleeding, i mean heavy period type, 5 days after i took it, a mere 2 weeks after i had started my last cycle. the bleeding lasted about 4 days. i thought perhaps it had reset my cycle but nope, got my &quot;normal&quot; period a few days early and it has been the most painful and heaviest i&#039;ve experienced in some time. 

obviously plan b works, although i have no idea whether or not i was even at risk of being pregnant. just know it will possibly upset your cycle."