Glow said I should have came on on the 27th and I didn't but not paying attention to that cus it's usually a little bit off anyway. I'm now 17dpo and got a clear positive opk (the line is darker than control line). However I know i already ovulated because a few days before my first positive opk I got shown the follicle getting ready to release an egg on my scan and when I got my positive opk I was having the usual ovulation pain. And I know i am not pregnant because I have af cramps! I know af is coming. So why have I got a positive opk again?