just keep testing. I had cycles that I wouldn't get a positive OPK till cd 16. Don't give up hope it will happen =o)
oh I forgot to ask...when are you testing during the day? the instructions for mine said to test in the afternoon so I would test around 3 and every day I tested I would do it as close to the same time as I could. Also if you're drinking a ton of fluids you could be diluting your urine an that could also be a reason. If you look on my profile in my journal I have a copy of Deanna's Plan. Read over that...it work for me and I know it's working for many others. Good luck hun!
I was doing it in the morning but Faith told me to change and I really don't drink all that much! And mine didn't have a time so yestserday I test bout 8 and I will again tonight! Its so hard when I work so much! Its just frustarting I'm afraid I won't o!
I ovulate on CD 15-17 so you may still get your positive OPK. How many days are in your cycle?
15! I still have a little hope last month I Od on the 9th (or atleast that was 14 days before AF) so after the 10 idk what ill do.