Low menstruation while on breastfeeding

Good day mga ka-momshies! Im a pure BF mom, i gave birth 4 mos ago. My question is, is it normal to have period na sobrang hina po, kasi makikita mo sya sa panty pero pag nag napkin na parang di nagttuloy tuloy. Tas everytime iihi dun lang may ksama maliliit na blood then after that mawawala ulit. Hindi ko tuloy alam if when ako magsstart ng pills kasi hindi ko maintindihan kung cycle ko na ba to. As per my OB's advice, safe naman daw until 6 mos, however, kung mejo nagaalinlangan ako I can start taking pills after 2 mos of giving birth on my first day of period. By the way, second panganak ko na ito, and hindi ako ganito sa panganay ko since until 3 mos ko lang sya nabreastfed. Help naman po sa mga breastfeeding mom baka may same scenario din po kayo. Thanks. 😪#advicepls #theasianparentph #breasfeedingmom