When to start testing

Kristin • Me 2 we 04/27/08💏 We 2 3 10/16/11👨‍👩‍👧 Lost 4 02/19👼🏻 Rainbow baby🌈👶🏼5/14/20

I’m on CD6 and stopped bleeding yesterday. I took provera for 3 days to jump start my period. When should I start testing with my OPKs?