Ovulation question

Kim • 1 daughter on earth🎀 & 1 daughter in heaven🕊

Has anyone that's used ovulation test got "low" and then two days later tested "peak" ????

According to my calendar I was suppose to ovulate in two days. when I tested today using clear blue advanced it told me that I'm low today. Then when I logged that it was low fertility today it changed my whole cycle..