15 dpo.. anyone else in the same boat?

Raeann

So I am 15 dpo today. I ovulated March 2 and we BD 4 days before and then on March 2, 3, 4 and 5. I took a hpt this morning and it was BFN. I am on a pretty regular cycle so I was due for AF this weekend and nothing yet. Anyone else out there get negatives, and then kept testing and got there positives more than 15 dpo?