Still haven't Ovulated

Ok, I took clomid 50mg on cd3-7 then got an u/s on cd12. Doctor said I have two follicles, one measuring 21mm and the other at 16mm. He told me and hubby to start bd on CD14, I've been doing opks and nothing. No ovulation and now I'm on CD19.

Is it possible I can still ovulate this cycle, or did my follicles just die out on me? I'm going to call my doctor tomorrow and have him do a progesterone test to see if I have this cycle.