Ovulation on Clomid

Bri
I am in my first cycle of Clomid 50 mg. I had CD 21 Bloodwork which indicated no ovulation. I am currently on CD 24 and supposed to wait til CD 35 to see if I have a positive pregnancy test or my period. Has anyone ever ovulated after CD 21? And if so, when did you wait to see if you were pregnant versus starting the Provera and the next round of Clomid?