confused first time using ovulation sticks

Hi I am a little confused started using the clearblue ovulation monthly sticks last Saturday the test said low fertilty on the Sunday morning I got peak fertilty smiley face which stayed for 2 day. It's my first time using ovulation sticks so I decided to test again on the Wednesday till today and I have received flashing smiling faces everyday which said high fertility can anyone help me not sure what this means?