Can you bleed and still be pregnant?

Caitie

So my AF was a day late. But she hasn't shown up in her usual fashion. I've had very little cramping and it's super light (the opposite of usual visits) my bbt hasn't dropped like Dr Google said it should when you friend starts.

Tests say not pregnant but body is weird. I have my college homecoming reunion this year and I was going to drink of AF showed but she's being weird and I want to be safe.