Late Period but a BFN

Ember • #ProudMom of a Preemie 🤱🏼Calvin Brady 1-18-18 🤱🏼 Rainbow Baby 👫+ 👉🏻👌🏼= 🌈👶🏼 Here for emotional support & to provide it for others
Period is due today and usually I wake up and I've started. Haven't yet, I took a text this morning and it was a BFN :( should I retest? And is it normal to get a negative the day of your missed period? Like is it still possible that I could be? HELP PLEASE 😩