Sayang, kalau dah delay 5 hari lepas ambil Postinor, kena lah go see your doctor atau buat pregnancy test untuk confirm, tak boleh tunggu-tunggu lagi, okay? They can check properly apa yang happening dan guide you next steps. A few of my mum friends pernah ambil emergency pills, sometimes period datang delayed atau lighter je, but better safe check with doc directly lah. Jangan stress dulu, go get it sorted!