Ah mama, yan ay medyo unusual talaga, lalo na kung consistent ka sa pills, definitely better to ask your OB about this one para sure, kasi bawat katawan ay different, especially habang nagbabrest ka pa lang! One of my mum friends din nag-experience ng irregular periods while breastfeeding, pero once she checked with her doctor, na-clarify agad kung ano ang normal for her at kung kailangan ng adjustment sa pills. Go ahead lang at take your pills as prescribed habang naghihintay ng appointment, pero huwag mo palampasin ang pagkonsulta para ma-rule out ang iba pang reasons, better safe than sorry, diba!