Oh dear, this is just so complicated! I tested CD 11 & 12 & got nothing. Then CD 15 & 16 I got super faint lines and CD 17 got nothing again. And of course FF has said O was CD 14 when I didn't test LOL! I've got the temp rise & everything to suggest O, other than MB ferning afterwards, I just don't understand why it was so early. Damn body caught me off guard & I don't think we have much of a chance. This is the reason I've never used OPKs I think!!
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