Ovulation

Hi, normally my periods and ovulation are regular each month. But this month my period was when it should have been but my ovulation was extremely earlier than normal. I’ve done consistent ovulation tests using the premom strips and my levels keep going up and down however with the digital blue digital sticks it keeps coming up with a flashing smiley face. I’m not sure if the premom sticks aren’t accurate or if the digital sticks aren’t. The flashing smiley face has been for about 3 days now so unsure which one to believe 🤦‍♀️