Positive opk strip but negative on clear blue

Ashley

Hello!

I’ve been taking the cheap ovulation test strips daily and today it was super dark. The test line was def darker than the control line. I took the clear blue advanced test and it was negative - blank circle.

Which should i listen to?! When i eject the strip from the clear blue the line is super light. I’ve take the clear blue twice with the same results. All from the same urine. The cheap tests show positive. So strange and confusing!! Calendar says I’ll ovulate today.