Hey all. This is my first time using an OPK. I have PCOS and so I wasn't sure if it'd work for me or not but figured I'd give it a shot. I just finished a round of Clomid and Letrozole 4 days ago. I'm on CD 13. I started using the OPK on the day after my period stopped (CD 7) because my periods are usually irregular and I wasn't sure exactly when to start. The OPK has been showing light lines (I've been using the Glow OPK analyzer to track) and it darkened a little on day 10. Still negative, but darker. It's stayed on that same level (if you use the analyzer, it was putting it at that 3rd visible line), for 2 days. This afternoon when I tested, it went backward a level. It's lighter than yesterday. Should I test again this evening? I'm pretty sure I haven't ovulated yet.... Glow has me due on Wednesday, and with the meds I feel like I actually will ovulate. Do you think it might be a fluke? I tested about 2 hours earlier than I have been. Could that be why the line is lighter? Maybe my PCOS is messing everything up. Ugh! Getting pregnant shouldn't be so hard...and it definitely didn't seem like it would be.