Hindi guaranteed na hindi ka mabubuntis kahit nag-pills ka, lalo na if hindi consistent ang intake or may missed days, maraming mums sa circle ko ang nag-rely lang sa pills tapos surprised na pregnant ulit! Breastfeeding alone isn't a sure contraceptive either, especially kung regular na ang periods mo or if baby's feeding schedule changes. Since sobrang matagal nang walang period, better check with your OB to rule out pregnancy or other hormonal changes, para sure ka talaga sa family planning mo. Take care!