Does anyone know why?

Michelle • Happily married ❤️💍 Gianna 👶💖 08.01.21 ❤️

So we’re going on 7 months TTC but this is my first cycle using BBT.

I’ve been cramping for 2 days. My period is due today but hasn’t started yet.

My tests are negative and have been - I started testing since 9dpo.

I’m fully expecting my period to come and actually want it to come today if it is because we’re going on vacation in a few days.

Any idea why my BBT came back up if my period is coming?