Ay, congrats on the baby! So normal yan, maraming mommy friends ko na nag-inject after delivery, at ang injectable talaga ay pwedeng mag-affect ng period, kaya baka delayed or maabot mo lang ulit after a few weeks depende sa katawan mo. Kasi nag-vary talaga ito from person to person, lalo na habang breastfeeding pa, so best to ask your OB directly sa next check-up kung anong normal para sa inyo, she knows your health history na, at masyado kang may peace of mind!