Yes, no or evaporated line

Ho

So too this in the afternoon 3 days before period due about DPO 12/13 not completely sure. Is this yes, no or a evap line??

I’m just not too sure. It was in the time frame and been told if it shows under indented photo it’s true 🤔

Should I test after miss period?? My periods are irregular so no guarantees it will arrive in 3 days.