Uy normal lang yan, lalo na if breastfeeding ka pa! Maraming moms na kakilala ko na ganyan din, may mens once tapos nawala ulit for months, it's because ng hormones from breastfeeding na nakakaaffect ng cycle. Since wala kayong protection at hindi ka nag-attempt mag-conceive, most likely just your body adjusting pa lang talaga, but better check with your OB just to be safe kaya lang, especially if concerned ka na irregular na talaga siya ngayong postpartum period mo.