CD8, Surprise Peak

Cara

On a whim I opk tested. It was a blazing positive. I'm not sure if I would have also had a peak on CD7? I just started to BBT this cycle. I did BBT and OPK with my previous pregnancies.

My DH isn't always home so we snuck in a BD just incase. Is it possible I ovulated on CD8? I thinking I'll need 1 more BBT on chart but was wondering what you think. DH is gone and probably won't be back till sometime tomorrow :(