When do opks actually mean pregnancy?

Based on when I ovulated I'm 5 days late and 21dpo. For the past 6 days I've had dark positive opks. The positive test line shows up immediately after the dye starts to run and dark. I'm so scared to do a pregnancy test. I have one and I don't want to waste it I think I'm going to wait a few more days. But could these opks mean pregnancy? I don't wanna do the test until I have enough reason to think it might come back positive 😩