So af is...late?

I’m usually never late. I’m like clockwork down to the day, hour, minute and second and af is always on time. Af was due yesterday but no signs of her...no symptoms except back pain and I’m tired but that’s it. I tested the day before she was due and it was a BFN. So I guess I’m still out. I’m sure I’d have a positive test of some sort by now. Soooo I don’t know 🤷🏽‍♀️