Missing AF 😬

Aimee • Mum of 2 boys 10 & 7 ttc baby number 3 💙💙💛 from london UK 🇬🇧

Hi guys, so i was due to come on 29/10 still not sign..... tested Saturday and got BFN how long should i wait if AF still doesn’t appear before i retest? Don’t want to get my hopes up to much :(