When using OPK kits, what CD do you see a smiley face?


I'm TTC month 2...sort of month 1 because last month was the first time I got my period since I was nursing. I got it almost exactly 3 weeks after I stopped nursing. I'm using Clearblue Advanced and Im on CD 17. No flashing smiley, no solid smiley. I just started having signs of CM this morning-up until now completely dry. I've always had a regular period. I feel like my prediction keeps going further and further out and my ovulation day going to be late. Is this normal?