Oo, normal yan mama, lalo na kung exclusively breastfeeding ka pa, ang prolactin from breastfeeding talaga nagsusuppress ng period! A few of us sa mommy group namin parang ganyan din, one friend namin nag-period lang after 2 years ng heavy breastfeeding. But since you're on pills na, better check with your OB kung bakit di pa bumabalik, baka need ng adjustment sa dose or timing, especially kung may spotting or cramping na nararamdaman mo. Congrats sa one year plus ng breastfeeding, that's amazing!