16 DPO and BFN

So I peak ovulated on the 10th August using clear blue ov test ,myself and partner had intercourse twice the 11th and everyday after, my last AF was 27th/28th of July . But I'm so confused as two issues I have .

1- glow says I'm a day or 2 late for this AF and clue says I'm not due untill Tommorow 🤷. I got my coil taken out end of may and it moved my AF along so ...

2- I've take early first response tests the last two days and still getting negatives.

I don't have any major symptoms but I am bloated more than usual and frequently feeling the urge to go wee .

Has anyone else had this issue TTC and had late BFN ? Need some hope 🙈