Question for success stories! Please help!!

My cycles are 28 days long, so one would assume I ovulate on cd14 or cd15. AF is due to arrive tomorrow, and I have only BFNs so far. My question is on what dpo did you ladies get your BFP? I'm asking because normally, during this time, I have raging PMS symptoms. I mean I am terrible, and I have zip zero NADA PMS symptoms!! So how many dpo did you get your BFP... especially if you're a 28 day-er?