Unprotected sex right after period ended - preggo?

Hi ladies!

My husband and I had sex unprotected on the 3rd day after my period ended (Dec 7). We are using Glow as birth control and tracking bbt every morning. We know this isn’t an 100% effective method and we’re okay with that. I wanted to get off of hormonal birth control so we’re taking the risk.

I’ve taken a pregnancy test and got a clear negative but am wondering if I’m too early to test? Should I test again if my period is late?

Ty!

Xx