I don't know, but I feel for you! My first PPAF seemed pretty normal (DD was 7 months old), and we got pregnant that month (this was a m/c in January). I tested + at about CD 28, so I suspect I had a pretty regular cycle--I normally do. However, since the m/c, I have not been nearly as regular. Last month's AF showed on CD 38, and after taking a bajillion negative pg tests, I decided I needed to temp this month. I O'd on CD 18 this month, so maybe a little closer to normal. I guess a long story to say that you could be pg, or you could be having wacky cycles!
On the side supporthing the idea that you are in fact pregnant, I was having symptoms as early as 8 or 9 dpo. Pulling in the round ligament area after standing up quickly, a feeling of "fullness", headache, sappy crying at things I would not normally cry at, and agreeing to get a third dog--which I decided against at the last minute (this is nearly a daily conversation with DH--me being the one that always says NO!). These are the reasons I decided to test early--I was also planning on waiting until Friday, which would be 14 DPO. I guess we are likely to be due at the same time. Good luck, keep us informed!
BTW, I love your daughter's name!
Stacy-- Wife to my DH, mom to three: noodle girl:, Lego boy , little guy :