Opk driving me nuts!!!!

Sarah • Mom to 3 living babies and 2 angels 👼👼 currently expecting a pot of gold 🌈 🤞
7 days of flashing smiley! 😡 I'm on CD 15. My last month I ovulated on CD 19. Hubby and I have been BD every other day right now. I took a pregnancy test because I heard a rumor if you get a flashing smiley for that long the test is detecting pregnancy. (I dkn but it was negative) what days do you guys get the big o in your cycle?