CB Digital OPK

Kr
I have been using Clearblue digital OPKs for about a week and have yet to see a smiley. I'm on CD 21 of a 34 day cycle. I've had what seem to be ovulation symptoms like EWCM and slight cramping but still no smiley face. Anyone experience this before? Have any of you gone on to become pregnant even though you never saw the smiley?