Oo normal lang yan mamsh, especially pag exclusive breastfeeding ka! A few of us moms experienced the same thing, yung period namin bumalik agad after a few weeks, tapos tumagal ng ilang months, then disappeared ulit habang nag-breastfeed pa rin kami heavily. It's because breastfeeding affects your hormones, kaya lactational amenorrhea talaga yan. But honestly, kung worried ka pa rin or may ibang changes na weird, better check with your OB para peace of mind lang, para sure na everything's good talaga!