Best Ovulation Test?

Rebecca

Hey guys. I've been ttc for a LONG time. Well, I've never had a positive opk. ever. Is it possible I'm just buying the wrong ones? I got them off eBay in a huge bundle.

I've been diagnosed with PCOS, BUT I've noticed mid cycle I do have cramping and eggwhite CM. But never a positive OPK. I DID get the 'flashing smiley' from clear blue advanced for like 6 days and just stopped testing.

What tests do you use? Is it possible I just have a bad batch?