U should go for the test only after she misses her due dates by atleast a week so as to confirm on pregnancy, until then u need to be patient, ipills u took has interrupted the menstrual cycle and it takes time to reset the cycles back in order again, the bleeding which happened will certainly now delay her periods ,ipills are not abortion pills ,they just gives a show,but doesn't prevent pregnancy if fertilisation has already happened.Repeat test if there is a delay in periods for an unusually long time.