Opk Help

On monday(3/25) I used the clear blue opk test and got a flashing smiley, then Tuesday(3/26) I got a solid smiley😊 I was confused because I also was testing using opk prediction strips aswell, and they didn’t show any surge in LH. Fast track to Friday morning(3/26) and uses the clear blue opk and it showed a solid smiley again and the test strips were actually showing up that I was ovulating. Not sure when I ovulated so I can’t tell when I should take a pregnancy test. I’ve also read many women say that after they were pregnant the opk tests were still showing dark lines which is what happened to me for four days.. Any thoughts? When should I take a pregnancy test.