My SO and I are TTC and have been for about 3 months. My period has been effed up since going off bc and my cycles are like 14 days, which would explain why I haven't gotten pregnant. This month I decided I'd try OPK's because I had no idea if my body was even trying to ovulate. I didn't get them until yesterday (day 13 of my cycle) and the one I took yesterday morning was positive. I took another today and the second line is even darker. Once I ovulate, will that line go away? Or does it stay dark during ovulation? I have never used these before and am kind of lost on how they work.