i had an abortion last feb 25th 2011,after abortion doctor give me a injection for not getting pregnant for three months at the same day 25th 2011.after three month,i started having femilon tablet for a month,but after 21days also i didnt get my period and i continuing to have next packet of tablet.can u plz tell me the reason ,y im not getting period.and how to take this tablet ..plz reply..