6 DPO means you know when you O'd and you made it! That's fabulous! I am currently driving myself nuts trying to figure out when I O. I never charted that before, and while I'm aware of CM and all, I never *really* paid attention to the whens of it all! I am testing like mad with these stupid opk's because the advice I got was to test twice a day...so I have the digitals and the line ones...and the line ones....well, there's good reason why they make digital! I get both lines, which helps, but the whole darker or lighter thing is sooo hard to tell! And one of the line bleeds...so its like...well...no? I am going to rely more on my digitals this week thank god for the smiley face!!!
Now I just need to GET a smiley face. I'm thinking it'll be somewhere towards the end of the week, though. The only chart I have to go by is the one I semi did right after my first m/c and when I got pregnant with DS. From the best of what I can tell, it was right around CD 20ish...but that was also 3 years ago.