Yes, the CD11 and CD12 sticks could be positive. What you're looking for is a test line that is as dark or darker than the control line. The test line on the CD10 test is lighter, so definitely negative.
However, there's two potential problems with the CD11 and CD12 sticks:
1. Some brands of OPK are positive if even some of the test line is darker (like yours are), but some brands require the entire test line to be darker (which yours are not, since there appears to be a dark edge and then a lighter part next to that when I look at them). The only way to know which category your brand falls into is to ask the manufacturer (or the supplier). I count mine as positive when I have a dark edge, but they are a different brand and I always confirm the positive with a digital OPK.
2. It's possible to get false positive OPKs in the 3-4 days after finishing the clomid tablets. I would would be wary of both the CD11 and CD12 ones on that basis. However, there is also a chance that you could O that soon after the clomid tablets, so you can't rule them out either. Annoying and confusing and frustrating, but that's my understanding of the situation.
For now, I'd assume they're positive and make sure you BD to try to catch the egg, but I'd also keep using the opks (and keep BDing) in case you actually O later in the cycle. The norm is to O 5-10 days after the last tablet, but there are some who O earlier and some who O later (and some who don't O at all because they need a higher dose).
Are you charting temps as well so you can confirm O after it happens? If you're temping, you can stop the opks after you get the sustained thermal shift to indicate O has happened.
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