Opk question

Payge

Ok so here is a pic of all my strips I’ve done this week. Normally my peak does don’t look so dark so I thought it was yesterday like all my apps predicted. Apparently it is today. I BD mon, wed, and yesterday. Do you think I still have a chance to get pregnant? I’ve read a lot that 2 days before ovulation is best to BD so that’s why I’m asking.