12 days late but negative tests!

I’m approx 12 days late, and done several tests which have all been negative. The last time I did one was 4 days ago... too nervous to do another one because I feel like it’s going to be a Negative again! :/

Have some mild Preg symptoms, and had some minor dark discharge when I wiped (and nothing more) 16 days after my ovulation date. I know I definately ovulated as I had a Solid Smiley on the CB ovulation kit! So I find it crazy that I haven’t had a period.

Anyone had negatives for a while, and then positives a few weeks after late period?!

Thank you!