you will mess your periods up. and waste your money. emergency contraception is called the "morning after" pill because this is when you should take it. if you are taking before you even have sex you need to re-evaluate your contraceptive needs. either get on birth control permanent "just in case" or insist 100% that your partner use a condom or just say no.
what can b the repercussion if a girl takes emrgency contraception without havng sex jst to avoid pregnancy fear.