BBT how does it work?

Jenna • Boy mom 1/27/2020 👶🏻💙 Twin Miscarriage 2014 👼🏻👼🏻

How does BBT work? Mine has been high lately, could that mean pregnancy or is that normal? it’s been 98 or a little higher the past few days and my body feels a bit hotter today. 🤔 I’m currently 11 DPO.