Test again on the 19th cd like I’m supposed to or keep going from my cd15?

Lemiah

What does this mean? Even tho I may be testing too early ? The first top test was taken yesterday cycle day 15 and the middle one was taken today cd16 with fmu and the bottom was today at 8:00 all results have been an empty smiley....Btw im using clear blue digital ovulation test Any suggestions, answers , or insight on what’s going on ?