ovulation and period timing question

Rebecca
Hi! I'm very confused. I use an ovulation predictor kit, and have for 4 months. I received the "happy face" peak fertility indicator on days 11 and 12, which also matched up with my temp tracking. I have 27-29 day cycles. I'm on day 29 now and have had sore breasts for over a week. I've taken 3 tests and all were negative. On top of that, everything I read indicates you ALWAYS get your period about 12 days post ovulation. So if I was pregnant I should get a positive result now, right?
Does anyone else ovulate early but have a later period?  

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