blm haid after nifas

hai bunda2, mw tya donk knp yaa stlah 6 bln lahiran after nifas, sy blm jg dtg haid. pdhal sy ga asi....infonya klo ga asi jstru lbh cepat dtg haidnya drpd asi. kira2 bahaya ga yaa klo blm dtg haid jg??