Cleablue Advanced OPK help!

Kayla

First month texting with clearblue digital advanced opk. Tested on CD 7 did not use first morning urine and got low fertility. Tested the next morning CD 8 first morning urine and got flashing smiley. Tested again first morning urine CD 9 and got the solid peak smiley. Is it possible to have a peak on CD9? This is earlier for my cycle.

Just wondering how accurate that peak result is?