My friend harini had sex before 1 month (date: april 19). Her periods date 12th of every month. But this month she did not got her periods now 8 days went extra. Now she has doubt that she got pregnant so only her periods did not came and she is sure of pregnant because every month she will get her periods on date or one day extra. So please suggest any medicine for periods she should not get pregnant she should get her periods. And if she puts that medicine what will happen? I mean she will get her periods? Please help.