Help with Ovulation and when to test!!

Hello my girls!

Some days ago I made a poll about what day you guys thought I ovulated with my bbt graphic and most of you said I ovulated on January 8th, even thought Fertility Friend said I ovulated on January 12th.

(About my period: I took my nexplanon on December 22th and haven’t had any period)

Some more days have passed and I want to know what you guys think because I am really nervous and I am fighting my urge to test for pregnancy because according to FF I’m only 8 DPO, buuuut If I really ovulated on day 8, I would be 12 DPO…

What do you guys think? Is Flo and FF right?

When should I test??