breastfeeding mom

ask lang po , maybpossible ba na mabuntis ako kahit withdrawal tapos may nangyare samin nubg nakaraan tapos kinabukasan nag karoon akonng mens? and may mommybpo ba dito na 1 month palang kapapanganak tapos breastfeeding eh nagbkaregla agad , and anongvtinake niyong pills?