Hey nips!
If your ticker is correct, you might get your positive OPK tomorrow since OPKs aren't usually (in my experience) positive until about 1-2 days before you actually O. Also, Clearblue has a higher sensitivity threshold than the internet cheapies so it will require more LH in the urine to turn positive. I used to use Clearblue digi OPKs until this cycle when my internet cheapies arrived. the IC turned positive when the CBdigi was (-). So that could be your issue too. However, if you have been watching your cycles for a while and sore throat and stuffy nose are the symptoms you get in your LP (luteal phase/post-O phase), then you might have already O'd, especially if your temps have risen significantly and have stayed that way for at least 3 days. I hope this isn't the case, if you didn't get to BD much before now...