Help? TMI but need answers!

Alex • Married. 29. Boy Mama to Remington, our rainbow baby 🌈 ❤️

The first picture was last night, the bottom picture is from today! My cervix is low and AF was due today but hasn't shown as if yet (good lord willing she won't come) I ovulated July 21st, had what seemed like implantation bleeding for two days after ovulation and I've been experiencing dizziness which is so unlike me and just been feeling a little off, I took a test this morning and got a BFN... any help would be appreciated. What do you think?!