What’s going on with me???

Okay so I know that no one will know 100% but I’d just like some insight.

I’m on CD51, AF was due today and didn’t show. BFN earlier this morning.

I gave birth feb 2018 and didn’t get my first postpartum period until April 10-15 of 2019 (last month)

And now this period is late.

I ovulated May 15th so I’m 14 dpo now. We only had sex on the 11th and the 18th. Thoughts? Would you think I’m pregnant? Or just AF acting weird ?