Ay, breakthrough bleeding yan, normal lang talaga sa first week or two ng birth control pills, lalo na if first time mo! A few of us moms sa group namin ay nag-experience din nun pag nagsimula kami ng pills, one friend thought defective agad, pero after a week or so lumabas na. Best to check with your OB po talaga to make sure lahat okay at wala pang ibang reason, pero most likely yan lang ang adjustment ng body mo sa hormones, continue taking it as prescribed and it should settle down within 1-2 weeks.