Opk detecting pregnancy?

Venus • Owner of Rosemary & Thyme Blog 🍨// Baby #1 born at 35 weeks🌻
I'm not ovulating. I know my body perfectly. I'm the same every single month for years. I took a opk just to take it. Seriously expected it to be negative but it was positive. I've read that an opk can predict pregnancy. Have any of you had this happen?