Opks are positive if the test line is almost the same color as the control or darker. cewcm is a good sign that you are Oing. I think most directions say too that you should test the same time everyday and limit liquids 2 hours before. So I would try to test at like 10am everyday. I just used opks this cycle and took them with fmu and that is NOT GOOD, duh! And I tested in the evenings...and they were negative. Your urine will be too concentrated in the mornings and give you a positive. I also started the day after my period ended. Of course I bought 30 strips, just to test everyday because you can O anytime really...and I really think I O at weird times...but so far they haven't been to helpful for me this cycle. I stopped using them on like 18cd but wished I would have continued as I am late and had lots of clear cm before x-mas and used an opk on x-mas eve and got two positives, but the next day it was negative...so WHO KNOWS!
So keep using them until you are out. You might have O'd already. Chart what your cm is doing. How long have you been ttc? So long as you have been bding while your cewcm then I think you should be good
