So my cycles have been 40 days long  but have been very irregular a lot of my life, I also have endometriosis. Well ive been taking opk s since cd 7 to try and pinpoint EXACTLY when I ovulate because we are going on a year of trying with no success ( we have a 20 month old). But so far my test just fluctuate between there being a darker line (not nearly positive) to just barley being able to see anything. Is this normal until you get your surge? Also if my cycles are 40 days and you get a oh surge 24-36 hours before you ovulate then I should have already right? Please any help would be awesome !