Clear blue digital OPK πŸ™‚ and βšͺ️?

Marissa
Can someone please understand why  I'm getting a high fertility flashing πŸ™‚ reading on one clear blue digital opk and on the new one I just bought it is saying low fertility βšͺ️? And how do I know whether I am at high fertility or low? I have been testing for over 10 days. I had 9 flashing smiley πŸ™‚ but no peak yet. I ran out of tests so I went and bought more and now I'm more confused than I was before...