Ay, honestly sis, this is one of those questions na kailangan talaga i-clarify with your doctor kasi depende sa kung anong pills or injection, kung kailan mo siya dapat simulan, at kung anong nangyari sa cycle mo, e? One of my mum friends started her contraceptive right after giving birth kahit walang regla pa, pero na-prescribe talaga ng OB niya yun specifically for breastfeeding moms, so definitely check with your doctor muna bago mag-start para sure ka na safe at epektibo talaga. Good luck, mama!