Third Clomid Round Complete - Where's AF?

Maddie
I am on Clomid because my cycles are very irregular, I have polycystic ovaries & I do not ovulate on my own. 
I completed my third Clomid round 50mg. My first two rounds I got a positive OPK CD19 first round & CD18 second round. Didn't conceive & AF showed relatively on time both rounds.  Currently 17 DPO CD 37 with no sign of AF. I've done multiple at home pregnancy tests & all are BFN
I do not think I'm pregnant because of my BFN's. 
I am worried I did not really ovulate. I know OPKS just show the surge & that doesn't confirm ovulation. I didn't experience breast soreness or ovulation cramping like I did the previous two months. 
I meet with my doctor tomorrow. However, any advice would be helpful. Is it possible I didn't ovulate? 
Thanks ladies!