MENSTRUATION PROBLEM

Hi im new mom po. and my baby is currently 7 months now Ako po ay exclusively breastfeeding to my baby girl and 4 months palang siya pinagtake ako ng ob ko ng daphne pills. After taking the pill I never had my period until now. Im just worried if you experience this kind of situation po? Since lockdown kasi I never had the chance to consult my ob maybe you can advice me or tell me its normal while we are in this pandemic Im a bit worried, (anyway I have hormonal imbalance before pa nong wala pa ako baby)