So I thought I was supposed to O on the 17th. Now on the 19th (CD 18) these are my OPK tests (same picture, different lighting) - the lines on the rightare the control line. The lines on the leftare the testing line. They are close but certainly not equal/darker (which I've had before). I've been testing fairly consistently for the past 3 days. Is it possible I missed it? Is this a positive opk? I have O symptoms right now so I'm not sure what's going on. DH and I have been BDing daily for the past 7 days (minus one day) and I'm wondering how much longer to keep it up!