"i took this pill 10 days before my period. and took it 37 hours within the 72 hour required. it made me tired and i had headaches, more than usual. then round the time of my period i was a little worried, and the day before my period i started to spot for 3 days. it was suppose to come on june 14. so i was even more worried. then come monday and thank god, my period came. i never been more excited for my period to come until now!! it works."