okynot, did you use a different brand yesterday than today? Some OPKs are more sensitive than others… you might have also had a little less concentrated pee when you tested today. Did you drink anything in the 2 hours before you tested? Any other fertile signs like EWCM, or opened cervix? Sorry so many questions, but there can be a few factors at play here. You MIGHT have had a fast surge and missed the + OPK, and so may still ovulate in the next 48 hours. You might not have missed the surge at all yet, and just did not have as much LH metabolized in your pee today for the test (that’snormal – also normal for LH to rise and fall before the real surge). Keep testing and keep BDing, assuming you have not Oed yet. If your CM gets really thick in the next day or so, then you might have ovulated. Even after my temp rise or + OPKs, I always BD for the rest of the week just to make sure I don’t miss a sneaky egg! Good luck!