Am I doing something wrong?

I'm currently on cycle day 69! That puts me at about 35 days late. Last week on the 28th I got a very positive ovulation test. The next day I took an hpt because I read online that sometimes when you're prego you can get a positive ovulation test. But the hpt was a bfn. Am I testing wrong? Or is there something else going on here? I have some symptoms of pregnancy. I'm cranky, sometimes overly sensitive, heart burn, I'm always tired no matter how much sleep I get, I pee very often.i don't know if it means anything or not but the past few days I've woke up feeling like I was getting a cold but it fades after a few hours! I just don't know why I'm so late and not pregnant! It's truly heartbreaking 

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